OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..57
FORMULA
a(n) = A307093(n^2).
MATHEMATICA
a[n_] := Sum[(-1)^k * Binomial[n^2, k^2], {k, 0, n}]; Array[a, 12, 0] (* Amiram Eldar, May 20 2021 *)
PROG
(PARI) {a(n) = sum(k=0, n, (-1)^k*binomial(n^2, k^2))}
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Mar 24 2019
STATUS
approved