central binomial coefficients modulo (was catalans modulo)

[Antti Karttunen]

>
> >
> >
> > For n>1, if (n+1) modulo 6 = 1 or 5, then (c(n) modulo (n+1))=0.
> >
> > Beginning of c(n) modulo (n+1), n>0:
> >
> > 1  1  2  0  2  0  4  6  0  0  8  0  0  10  8  0  0  0  0  0  0  0 .....
> >
> > (sequence not in EOIS)
> >
> > Are there others n with  c(n) modulo (n+1) not zero ?
>
> Concerning this problem, see
> http://www.research.att.com/cgi-bin/access.cgi/as/njas/sequences/eisA.cgi?Anum=A046097
>
> and its assorted links, and old postings on this mailing list
> from october & november of 1999.
> (Answer is: most probably not)

Maybe I was a bit hasty here, as I mixed the question
asked by Clause with the one posed on this list and in
A046097...
But now I'm going for lunch, and leave this problem
out of my mind.

Bon appetit!,

Antti

> >
> > Claude lenormand (e-mail: hlne.lenormand at voonoo.net)