# Number sequence

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### #69 anto

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Posted 16 May 2007 - 09:39 AM

probably smaller

### #70 Pyrotex

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Posted 16 May 2007 - 12:58 PM

Using about the algorithm Pyro describes... Still, I don’t think this is what the target sequences inventor intends – it doesn’t quite seem to satisfy the “any 5th grader could do it” criterion....

I agree. I've given up on that approach.

### #71 max4236

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Posted 17 May 2007 - 10:20 PM

1

1 2

3 2 3

3 4 3 4

5 4 5 4 5

5 6 5 6 5 6

1  1  2  3  2  3  3  4  3  4  5  4  5  4  5

0  2  4  6  8 10 12 14 16 18 20 22 24 26 28

p=# of primes used in sum s, x=product of the primes

p  s          | x       ->1,2,4,8,15,30,50,100,98,375..

1  0 1(not p.)|         1

1  2=2        | 2      =2

2  4=2+2      | 2*2    =4

3  6=2+2+2    | 2*2*2  =8

2  8=5+3      | 5*3    =15

3 10=5+3+2    | 5*3*2  =30

3 12=5+5+2    | 5*5*2  =50

4 14=5+5+2+2  | 5*5*2*2=100

3 16=11+3+2   | 11*3*2 =66

or

16=7+7+2      7*7*2  =98 <-?

4 18=11+3+2+2 | 11*3*2*2=132

or

7+7+2+2    7*7*2*2=196

or

7+5+3+3    7*5*3*3=315

or

5+5+5+3    5*5*5*3=375 <-??

5 20=11+3+2+2+2

.

.

.

ack..

------------------------

14 (4)

7 3 2 2  84

5 5 2 2 100<- 100>84>45

5 3 3 3  45

12 (3)

7 3 2  42

5 5 2  50<- 50>42

### #72 anto

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Posted 18 May 2007 - 10:35 AM

I actually tied that method and a smiliar one using prime numbers, none worked . So 66 is not the right anwer, I don't know about 98 though.

### #73 Pyrotex

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Posted 18 May 2007 - 11:12 AM

I LIKE it!!!!!!!!!!!!!!!!!

### #74 max4236

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Posted 01 March 2015 - 11:24 AM

pattern of triangle numbers? ((n+1)n/2):
1      3        6    ***    28  *     45  **    78  ***   136
153    171    190    ***   276  *    325  **   406  ***   528
561    595    630    ***   780  *    861  **   990  ***  1176
1225  1275   1326    ***  1540  *   1653  **  1830  ***  2080
(###*** #*#**#***#  ?)

social media is based in binary:
tri#  128    64    32    16    8     4     2     1
1    0     0     0     0     0     0     0     1     64
3    0     0     0     0     0     0     1     1     32
6    0     0     0     0     0     1     1     0     16
28    0     0     0     1     1     1     0     0      8
45    0     0     1     0     1     1     0     1      4
78    0     1     0     0     1     1     1     0      2
136    1     0     0     0     1     0     0     0      1
------------------------------------------------------------
1     2     4     8    15    30    50    100

maybe this is next:
tri#   512   256   128    64    32   16     8     4     2     1
153     0     0     1     0     0     1     1     0     0     1   64
171     0     0     1     0     1     0     1     0     1     1   32
190     0     0     1     0     1     1     1     1     1     0   16
276     0     1     0     0     0     1     0     1     0     0    8
325     0     1     0     1     0     0     0     1     0     1    4
406     0     1     1     0     0     1     0     1     1     0    2
528     1     0     0     0     0     1     0     0     0     0    1
------------------------------------------------------------------------
1    14   114     4    48     91   112    30   50   100
(1<150)

1    2    4    8    15   30   50    100
1   14  114    4   48   91   112   30   50    100
1   126   14    3   54   80  119    15   30   50    100
1  126    14   18   96  100   55   36   112   30   50    100
...

1,2,4,8,15,30,50,100, 1,14,114,4,48,91,112,30,100, 1,126,14,3,54,80,119,15,....

Edited by max4236, 09 February 2016 - 12:19 PM.