3405357826

Appears in sequences

• a(n) = 1+(n+1)^2+n!+Sum_{k=1..n-1} binomial(n,k)*n!/(n-k)!.at n=11A274294
• a(n) = (n + 1)^2 + n!*L_n(-1), where L_n(x) is the Laguerre polynomial.at n=11A317094