a(n) = Sum_{j=1..n} binomial(n^2, j).

A007819

a(n) = Sum_{j=1..n} binomial(n^2, j).

Terms

    a(0) =1a(1) =10a(2) =129a(3) =2516a(4) =68405a(5) =2391495a(6) =102022809a(7) =5130659560a(8) =296881218693

External references