a(n) = 5*n^2 + 20*n + 4.

Terms

a(0) =29a(1) =64a(2) =109a(3) =164a(4) =229a(5) =304a(6) =389a(7) =484a(8) =589a(9) =704a(10) =829a(11) =964a(12) =1109a(13) =1264a(14) =1429a(15) =1604a(16) =1789a(17) =1984a(18) =2189a(19) =2404a(20) =2629a(21) =2864a(22) =3109a(23) =3364a(24) =3629a(25) =3904a(26) =4189a(27) =4484a(28) =4789a(29) =5104