a(n) = 31*n^2 + 1.

Terms

a(0) =1a(1) =32a(2) =125a(3) =280a(4) =497a(5) =776a(6) =1117a(7) =1520a(8) =1985a(9) =2512a(10) =3101a(11) =3752a(12) =4465a(13) =5240a(14) =6077a(15) =6976a(16) =7937a(17) =8960a(18) =10045a(19) =11192a(20) =12401a(21) =13672a(22) =15005a(23) =16400a(24) =17857a(25) =19376a(26) =20957a(27) =22600a(28) =24305a(29) =26072