a(n) = 10*n^2 - 6*n + 1.

Terms

a(0) =5a(1) =29a(2) =73a(3) =137a(4) =221a(5) =325a(6) =449a(7) =593a(8) =757a(9) =941a(10) =1145a(11) =1369a(12) =1613a(13) =1877a(14) =2161a(15) =2465a(16) =2789a(17) =3133a(18) =3497a(19) =3881a(20) =4285a(21) =4709a(22) =5153a(23) =5617a(24) =6101a(25) =6605a(26) =7129a(27) =7673a(28) =8237a(29) =8821