OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..100
FORMULA
a(n) = A005260(2*n).
MATHEMATICA
Table[Sum[Binomial[2*n, k]^4, {k, 0, 2*n}], {n, 0, 30}] (* G. C. Greubel, Aug 04 2018 *)
PROG
(PARI) {a(n) = sum(k=0, 2*n, binomial( 2*n, k)^4)};
(Magma) [(&+[Binomial(2*n, k)^4: k in [0..2*n]]): n in [0..30]]; // G. C. Greubel, Aug 04 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Michael Somos, Oct 25 2014
STATUS
approved