OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..50
FORMULA
a(n) = [x^n] 1/(1-x)^(2^n + n + 1).
MAPLE
MATHEMATICA
Table[Binomial[2^n+2n, n], {n, 0, 20}] (* Harvey P. Dale, Jun 01 2016 *)
PROG
(PARI) a(n)=binomial(2^n+2*n, n)
(Sage) [binomial(2^n+2*n, n) for n in (0..20)] # G. C. Greubel, Mar 14 2021
(Magma) [Binomial(2^n+2*n, n): n in [0..20]]; // G. C. Greubel, Mar 14 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Aug 26 2007
STATUS
approved