a(n) = 6*n^2 + 6*n + 31.

Terms

a(0) =31a(1) =43a(2) =67a(3) =103a(4) =151a(5) =211a(6) =283a(7) =367a(8) =463a(9) =571a(10) =691a(11) =823a(12) =967a(13) =1123a(14) =1291a(15) =1471a(16) =1663a(17) =1867a(18) =2083a(19) =2311a(20) =2551a(21) =2803a(22) =3067a(23) =3343a(24) =3631a(25) =3931a(26) =4243a(27) =4567a(28) =4903a(29) =5251