a(n) = 128*n^2 + 32*n + 1.

Terms

a(0) =161a(1) =577a(2) =1249a(3) =2177a(4) =3361a(5) =4801a(6) =6497a(7) =8449a(8) =10657a(9) =13121a(10) =15841a(11) =18817a(12) =22049a(13) =25537a(14) =29281a(15) =33281a(16) =37537a(17) =42049a(18) =46817a(19) =51841a(20) =57121a(21) =62657a(22) =68449a(23) =74497a(24) =80801a(25) =87361a(26) =94177a(27) =101249a(28) =108577a(29) =116161