OFFSET
1,1
COMMENTS
Integers k such that A056617(k) = 1. - Michel Marcus, May 27 2019
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range@ 1500, Mod[Binomial[2 #, #], 2 # + 1] == 0 &] (* Michael De Vlieger, May 27 2019 *)
PROG
(PARI) isok(n) = ! (binomial(2*n, n) % (2*n+1)); \\ Michel Marcus, Nov 28 2013
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Aug 17 2002
STATUS
approved