a(n) = n^9+9n.

Terms

a(0) =0a(1) =10a(2) =530a(3) =19710a(4) =262180a(5) =1953170a(6) =10077750a(7) =40353670a(8) =134217800a(9) =387420570a(10) =1000000090a(11) =2357947790a(12) =5159780460a(13) =10604499490a(14) =20661046910a(15) =38443359510a(16) =68719476880a(17) =118587876650a(18) =198359290530a(19) =322687697950a(20) =512000000180