a(n) = 5*n^2 + 3*n.

Terms

a(0) =8a(1) =26a(2) =54a(3) =92a(4) =140a(5) =198a(6) =266a(7) =344a(8) =432a(9) =530a(10) =638a(11) =756a(12) =884a(13) =1022a(14) =1170a(15) =1328a(16) =1496a(17) =1674a(18) =1862a(19) =2060a(20) =2268a(21) =2486a(22) =2714a(23) =2952a(24) =3200a(25) =3458a(26) =3726a(27) =4004a(28) =4292a(29) =4590