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

A173192

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

Terms

    a(0) =1a(1) =72a(2) =2916a(3) =87480a(4) =2165130a(5) =46766808a(6) =911952756a(7) =16415149608a(8) =277005649635

External references