a(n) = binomial(n+10, 10)*9^n.A196221a(n) = binomial(n+10, 10)*9^n.Terms a(0) =1a(1) =99a(2) =5346a(3) =208494a(4) =6567561a(5) =177324147a(6) =4255779528a(7) =93019181112External referencesoeis: A196221