a(n) = binomial(n+9, 9)*7^n.

A197192

a(n) = binomial(n+9, 9)*7^n.

Terms

    a(0) =1a(1) =70a(2) =2695a(3) =75460a(4) =1716715a(5) =33647614a(6) =588833245a(7) =9421331920a(8) =140142312310

External references