a(n) = (n+4)^n*binomial(n+2,2).

A081196

a(n) = (n+4)^n*binomial(n+2,2).

Terms

    a(0) =1a(1) =15a(2) =216a(3) =3430a(4) =61440a(5) =1240029a(6) =28000000a(7) =701538156a(8) =19349176320a(9) =583247465515

External references