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

Terms

a(0) =1a(1) =8a(2) =255a(3) =3280a(4) =21845a(5) =97656a(6) =335923a(7) =960800a(8) =2396745a(9) =5380840a(10) =11111111a(11) =21435888a(12) =39089245a(13) =67977560a(14) =113522235a(15) =183063616a(16) =286331153a(17) =435984840a(18) =648232975a(19) =943531280a(20) =1347368421a(21) =1891142968a(22) =2613136835a(23) =3559590240a(24) =4785883225a(25) =6357828776a(26) =8353082583