a(n) = 484*n^2 - 2*n.

Terms

a(0) =482a(1) =1932a(2) =4350a(3) =7736a(4) =12090a(5) =17412a(6) =23702a(7) =30960a(8) =39186a(9) =48380a(10) =58542a(11) =69672a(12) =81770a(13) =94836a(14) =108870a(15) =123872a(16) =139842a(17) =156780a(18) =174686a(19) =193560a(20) =213402a(21) =234212a(22) =255990a(23) =278736a(24) =302450a(25) =327132a(26) =352782a(27) =379400a(28) =406986a(29) =435540