a(n) = Sum_{k=0..n} (-1)^k * binomial(n^2,k^2).

A307094

a(n) = Sum_{k=0..n} (-1)^k * binomial(n^2,k^2).

Terms

    a(0) =1a(1) =0a(2) =-2a(3) =117a(4) =-9634a(5) =12625a(6) =6612982405

External references