a(n) = binomial(n+9, 9)*9^n.A197194a(n) = binomial(n+9, 9)*9^n.Terms a(0) =1a(1) =90a(2) =4455a(3) =160380a(4) =4691115a(5) =118216098a(6) =2659862205a(7) =54717165360External referencesoeis: A197194