a(n) = (n+1)^n*binomial(n+2,2).

A081132

a(n) = (n+1)^n*binomial(n+2,2).

Terms

    a(0) =1a(1) =6a(2) =54a(3) =640a(4) =9375a(5) =163296a(6) =3294172a(7) =75497472a(8) =1937102445a(9) =55000000000

External references