Pb on A117871

[Russ Cox]

> There is a little pb on A117871 :
> %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...
> Def :
> %N A117871 Smallest divisor of 2n that is > 2, or 0 if no such divisor exists.
> ---------
> 
> The sequence of these definition is :
> 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...
> It's the decomposition of even numbers in weight*level (gap=cste=0).
> ---------
> 
> The definition for the sequence :
> %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...
> is :
> 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 decomposition of even numbers in weight*level+gap (gap=cste=2).

The sequence is correct as it is.
The offset line in the sequence indicates
that the first term listed is a(0), not a(1).

http://www.research.att.com/~njas/sequences/table?a=117871&fmt=4
http://www.research.att.com/~njas/sequences/A117871

Russ