a(n) = 4*n^2 + 10*n + 1.

Terms

a(0) =1a(1) =15a(2) =37a(3) =67a(4) =105a(5) =151a(6) =205a(7) =267a(8) =337a(9) =415a(10) =501a(11) =595a(12) =697a(13) =807a(14) =925a(15) =1051a(16) =1185a(17) =1327a(18) =1477a(19) =1635a(20) =1801a(21) =1975a(22) =2157a(23) =2347a(24) =2545a(25) =2751a(26) =2965a(27) =3187a(28) =3417a(29) =3655