a(n) = n^4 + 5*n^2 + 1.

Terms

a(0) =1a(1) =7a(2) =37a(3) =127a(4) =337a(5) =751a(6) =1477a(7) =2647a(8) =4417a(9) =6967a(10) =10501a(11) =15247a(12) =21457a(13) =29407a(14) =39397a(15) =51751a(16) =66817a(17) =84967a(18) =106597a(19) =132127a(20) =162001a(21) =196687a(22) =236677a(23) =282487a(24) =334657a(25) =393751a(26) =460357a(27) =535087a(28) =618577a(29) =711487