[seqfan] Re: A160242

[Paolo Lava]

Ok thanks Richard!

Paolo

2010/4/15 Richard Mathar <mathar at strw.leidenuniv.nl>

>
> pl> From seqfan-bounces at list.seqfan.eu Thu Apr 15 11:09:37 2010
> pl> From: Paolo Lava <paoloplava at gmail.com>
> pl> Subject: [seqfan]  A160242
> pl> ...
> pl> It could be that the original definition of A160242 (see comment) was
> right
> pl> but I certainly do not understand the present one. It should be like
> A010052
> pl> with 0 replaced by 2. Or not???
>
> A160242 can be defined as
>
> "a(n)=1 if n =0 or n in A002061, otherwise a(n)=2"
>
> So it is some sort of characteristic function of the central polygonal
> numbers
> http://oeis.org/classic/A002061 .
>
> RJM
>
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>