a(n) = 900*n^2 - 2*n.

Terms

a(0) =898a(1) =3596a(2) =8094a(3) =14392a(4) =22490a(5) =32388a(6) =44086a(7) =57584a(8) =72882a(9) =89980a(10) =108878a(11) =129576a(12) =152074a(13) =176372a(14) =202470a(15) =230368a(16) =260066a(17) =291564a(18) =324862a(19) =359960a(20) =396858a(21) =435556a(22) =476054a(23) =518352a(24) =562450a(25) =608348a(26) =656046a(27) =705544a(28) =756842a(29) =809940