a(n) = binomial(n+9, 9)*8^n.

A196280

a(n) = binomial(n+9, 9)*8^n.

Terms

    a(0) =1a(1) =80a(2) =3520a(3) =112640a(4) =2928640a(5) =65601536a(6) =1312030720a(7) =23991418880a(8) =407854120960

External references