1782019

Appears in sequences

• E.g.f.: exp(x + 4*x^2 + 9*x^3 + 16*x^4).at n=7A293723
• Square array A(n,k), n >= 0, k >= 1, read by antidiagonals, where column k is the expansion of e.g.f. exp(Sum_{j=1..k} j^2*x^j).at n=62A293724