OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..50
FORMULA
G.f.: A(x) = x*Sum_{n>=0} 2^n*log(1+2^n*x)^n/n!. - Paul D. Hanna, Jun 21 2009
a(n) ~ 2^(n*(n-1)) / (n-1)!. - Vaclav Kotesovec, Jul 02 2016
MAPLE
seq(binomial(2^n, n-1), n=1..20);
MATHEMATICA
Table[Binomial[2^n, n-1], {n, 1, 15}] (* Vaclav Kotesovec, Jul 02 2016 *)
PROG
(PARI) a(n)=binomial(2^n, n-1) \\ Paul D. Hanna, Jun 21 2009
(PARI) a(n)=polcoeff(x*sum(k=0, n, 2^k*log(1+2^k*x+x*O(x^n))^k/k!), n) \\ Paul D. Hanna, Jun 21 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Jorge Coveiro, Dec 25 2004
EXTENSIONS
Terms a(13) and beyond from Andrew Howroyd, Feb 12 2020
STATUS
approved