653023

Appears in sequences

• a(n) = Sum_{k=0..n} C(n,k)^2*(n-k)!*k^2.at n=7A105219
• Triangle of coefficients of n!*(1 - x)^n*L_n(x/(1 - x)), where L_n(x) is the Laguerre polynomial.at n=34A123202
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = Sum_{j=0..n} j^k * (n-j)! * binomial(n,j)^2.at n=52A341200