a(n) = (n+1)! * int(Gamma(n+x)/Gamma(x), x = 0..1).

A245765

a(n) = (n+1)! * int(Gamma(n+x)/Gamma(x), x = 0..1).

Terms

    a(0) =1a(1) =1a(2) =5a(3) =54a(4) =1004a(5) =28500a(6) =1145220a(7) =61822320a(8) =4314308544a(9) =377894704320

External references