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

Terms

a(0) =1a(1) =4a(2) =85a(3) =820a(4) =4369a(5) =16276a(6) =47989a(7) =120100a(8) =266305a(9) =538084a(10) =1010101a(11) =1786324a(12) =3006865a(13) =4855540a(14) =7568149a(15) =11441476a(16) =16843009a(17) =24221380a(18) =34117525a(19) =47176564a(20) =64160401a(21) =85961044a(22) =113614645a(23) =148316260a(24) =191435329a(25) =244531876a(26) =309373429a(27) =387952660a(28) =482505745a(29) =595531444