a(n) = 169*n^2 + 13.

Terms

a(0) =13a(1) =182a(2) =689a(3) =1534a(4) =2717a(5) =4238a(6) =6097a(7) =8294a(8) =10829a(9) =13702a(10) =16913a(11) =20462a(12) =24349a(13) =28574a(14) =33137a(15) =38038a(16) =43277a(17) =48854a(18) =54769a(19) =61022a(20) =67613a(21) =74542a(22) =81809a(23) =89414a(24) =97357a(25) =105638a(26) =114257a(27) =123214a(28) =132509a(29) =142142