a(n) = n^9 + n^8 + n^7 + n^6 + n^5 + n^4 + n^3 + n^2 + n + 1.

Terms

a(0) =1a(1) =10a(2) =1023a(3) =29524a(4) =349525a(5) =2441406a(6) =12093235a(7) =47079208a(8) =153391689a(9) =435848050a(10) =1111111111a(11) =2593742460a(12) =5628851293a(13) =11488207654a(14) =22250358075a(15) =41189313616a(16) =73300775185a(17) =125999618778a(18) =210027483919a(19) =340614792100a(20) =538947368421a(21) =833994048910