1,1

Previous name was "Numbers n such that C(3n,n)*2^n/(50n-6) is an integer".

Table of n, a(n) for n=1..55.

(PARI) isok(n) = ((binomial(3*n, n)*2^n) % (50*n-6)) == 0; \\ Michel Marcus, Nov 28 2013

Sequence in context: A138594 A131651 A134642 * A226025 A082686 A102030

Adjacent sequences: A072971 A072972 A072973 * A072975 A072976 A072977

easy,nonn

Benoit Cloitre, Aug 13 2002

New name suggested by Ralf Stephan and entered by Michel Marcus, Nov 28 2013

approved