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-   -   unusual sequence (https://www.mersenneforum.org/showthread.php?t=2493)

tom11784 2004-05-19 01:57

unusual sequence
 
A friend gave this to me in reply to a friend giving it to her.
Neither of us have any idea of what is going on in the sequence.

11, 11, 12, 13, 21, 21, 23, 23, 25, 29, 29, 31, 32, 31, 32, 35, 38, 37...

Any ideas? Please?

THILLIAR 2004-05-19 05:08

I am going to guess that it is diameter at breast height of trees in someone's backyard. :grin:

tom11784 2004-05-20 01:58

nope - found out today that there is something actually mathematical behind it

[spoiler] primes 2,3,5,7,... in base 1,2,3,4,... [/spoiler]

jinydu 2004-05-20 02:00

Is it actually possible to have a base 1 system?

tom11784 2004-05-20 02:00

[spoiler]
unary ... #s are represented by all 1s except for 0
i.e. 2=11, 3=111, 5=11111, 0=0, 1=1
[/spoiler]

Erasmus 2004-05-20 12:35

Maybe remainders of modulo of a very special number for successive primes?


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