a(n) = 13*n^2 - 16*n + 5.

Terms

a(0) =5a(1) =2a(2) =25a(3) =74a(4) =149a(5) =250a(6) =377a(7) =530a(8) =709a(9) =914a(10) =1145a(11) =1402a(12) =1685a(13) =1994a(14) =2329a(15) =2690a(16) =3077a(17) =3490a(18) =3929a(19) =4394a(20) =4885a(21) =5402a(22) =5945a(23) =6514a(24) =7109a(25) =7730a(26) =8377a(27) =9050a(28) =9749a(29) =10474