a(n) = n^5 + n - 1.

Terms

a(0) =-1a(1) =1a(2) =33a(3) =245a(4) =1027a(5) =3129a(6) =7781a(7) =16813a(8) =32775a(9) =59057a(10) =100009a(11) =161061a(12) =248843a(13) =371305a(14) =537837a(15) =759389a(16) =1048591a(17) =1419873a(18) =1889585a(19) =2476117a(20) =3200019a(21) =4084121a(22) =5153653a(23) =6436365a(24) =7962647a(25) =9765649a(26) =11881401a(27) =14348933a(28) =17210395a(29) =20511177