a(n) = 289n^2 + 2n.

Terms

a(0) =291a(1) =1160a(2) =2607a(3) =4632a(4) =7235a(5) =10416a(6) =14175a(7) =18512a(8) =23427a(9) =28920a(10) =34991a(11) =41640a(12) =48867a(13) =56672a(14) =65055a(15) =74016a(16) =83555a(17) =93672a(18) =104367a(19) =115640a(20) =127491a(21) =139920a(22) =152927a(23) =166512a(24) =180675a(25) =195416a(26) =210735a(27) =226632a(28) =243107a(29) =260160