a(n) = n!*(e*Gamma(n,1)*(n-1)+1).

A262601

a(n) = n!*(e*Gamma(n,1)*(n-1)+1).

Terms

    a(0) =1a(1) =6a(2) =66a(3) =1176a(4) =31320a(5) =1174320a(6) =59184720a(7) =3866728320a(8) =318176449920

External references