a(n) = binomial(n + 6, 6)*9^n.

A173191

a(n) = binomial(n + 6, 6)*9^n.

Terms

    a(0) =1a(1) =63a(2) =2268a(3) =61236a(4) =1377810a(5) =27280638a(6) =491051484a(7) =8207574804a(8) =129269303163

External references