a(n) = 8*n^2 + 14*n + 5.

Terms

a(0) =5a(1) =27a(2) =65a(3) =119a(4) =189a(5) =275a(6) =377a(7) =495a(8) =629a(9) =779a(10) =945a(11) =1127a(12) =1325a(13) =1539a(14) =1769a(15) =2015a(16) =2277a(17) =2555a(18) =2849a(19) =3159a(20) =3485a(21) =3827a(22) =4185a(23) =4559a(24) =4949a(25) =5355a(26) =5777a(27) =6215a(28) =6669a(29) =7139