Pb on A117871

[reismann at free.fr]

Oh yes, the offset, ok.

So we have :
%S A117871 0,0,4,3,4,5,3,7,4,3,4,11,3,13,4,3,4,17,3,19,4,3,4,23,3,5,4,3...
%N A117871 Smallest divisor of 2n that is > 2, or 0 if no such divisor
It's the weight in the decomposition of even numbers in weight*level
(gap=cste=0).

and

0,0,0,4,3,4,5,3,7,4,3,4,11,3,13,4,3,4,17,3,19,4,3,4,23...(with the same offset)
Smallest divisor of 2n-2 that is > 2, or 0 if no such divisor exists.
or :
a(n) = smallest k such that 2 = 2n mod k, or 0 if no such k exists.
It's the weight in the decomposition of even numbers in weight*level+gap
(gap=cste=2).

A pb of offset...
Thank you,

Best,

Rémi



Straightforward duplicates:

A061269 and A061271
A072653 and A111258
A093831 and A123654
A077827 and A077844
A007647 and A098980
A056259 and A101145
A056262 and A101152
A027319 and A027320


Possible duplicates:

A056982 and A110258 (possibility noted in comment to A110258)
http://www.research.att.com/~njas/sequences/?q=id:A056982|id:A110258

A076098 and A081970
http://www.research.att.com/~njas/sequences/?q=id:A076098|id:A081970

A088802 and A123854 (possibility noted in comment to A088802)
http://www.research.att.com/~njas/sequences/?q=id:A088802|id:A123854

A053191 and A115135 (IMO, interesting possible duplicate)
http://www.research.att.com/~njas/sequences/?q=id:A053191|id:A115135

A091928 and A122694
http://www.research.att.com/~njas/sequences/?q=id:A091928|id:A122694

A072653 and A111258
http://www.research.att.com/~njas/sequences/?q=id:A072653|id:A111258