a(n) = n^6 + 1.

Terms

a(0) =1a(1) =2a(2) =65a(3) =730a(4) =4097a(5) =15626a(6) =46657a(7) =117650a(8) =262145a(9) =531442a(10) =1000001a(11) =1771562a(12) =2985985a(13) =4826810a(14) =7529537a(15) =11390626a(16) =16777217a(17) =24137570a(18) =34012225a(19) =47045882a(20) =64000001a(21) =85766122a(22) =113379905a(23) =148035890