0,3

Also a(n-1) = C(2^n,2^(n-1))/(2^n - 1)/2 - Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 17 2002

David Wasserman (dwasserm(AT)earthlink.net), May 07 2007, Table of n, a(n) for n = 0..9

Eric Weisstein's World of Mathematics, Catalan Number

Binomial(2^(n+1)-2, 2^n-1)/(2^n).

a(n) = A000108(2^n-1). - David Wasserman (dwasserm(AT)earthlink.net), May 07 2007

Cf. A000108.

Cf. A094389.

Sequence in context: A075769 A046274 A147684 this_sequence A054332 A145247 A055305

Adjacent sequences: A038000 A038001 A038002 this_sequence A038004 A038005 A038006

nonn

Christian G. Bower (bowerc(AT)usa.net)