a(n) = 1*9^n + 2*8^n + 3*7^n + 4*6^n + 5*5^n + 6*4^n + 7*3^n + 8*2^n + 9*1^n.
A254147
a(n) = 1*9^n + 2*8^n + 3*7^n + 4*6^n + 5*5^n + 6*4^n + 7*3^n + 8*2^n + 9*1^n.
Terms
- a(0) =45a(1) =165a(2) =825a(3) =4917a(4) =32505a(5) =229845a(6) =1703625a(7) =13072917a(8) =103008345a(9) =828707925a(10) =6779099625a(11) =56214660117a(12) =471424600185
External references
- oeis: A254147