a(n) = Sum_{k=0..n} C(n^2-k^2, n-k)*C(k^2, k).
A184357
a(n) = Sum_{k=0..n} C(n^2-k^2, n-k)*C(k^2, k).
Terms
- a(0) =1a(1) =2a(2) =15a(3) =226a(4) =5079a(5) =151326a(6) =5611906a(7) =248995090a(8) =12862665297a(9) =758353907422
External references
- oeis: A184357