a(n) = 48*n^2 + 1.

Terms

a(0) =1a(1) =49a(2) =193a(3) =433a(4) =769a(5) =1201a(6) =1729a(7) =2353a(8) =3073a(9) =3889a(10) =4801a(11) =5809a(12) =6913a(13) =8113a(14) =9409a(15) =10801a(16) =12289a(17) =13873a(18) =15553a(19) =17329a(20) =19201a(21) =21169a(22) =23233a(23) =25393a(24) =27649a(25) =30001a(26) =32449a(27) =34993a(28) =37633a(29) =40369