a(n) = 441n^2 + 2n.

Terms

a(0) =443a(1) =1768a(2) =3975a(3) =7064a(4) =11035a(5) =15888a(6) =21623a(7) =28240a(8) =35739a(9) =44120a(10) =53383a(11) =63528a(12) =74555a(13) =86464a(14) =99255a(15) =112928a(16) =127483a(17) =142920a(18) =159239a(19) =176440a(20) =194523a(21) =213488a(22) =233335a(23) =254064a(24) =275675a(25) =298168a(26) =321543a(27) =345800a(28) =370939a(29) =396960