a(n) = 225n^2 + 2n.

Terms

a(0) =227a(1) =904a(2) =2031a(3) =3608a(4) =5635a(5) =8112a(6) =11039a(7) =14416a(8) =18243a(9) =22520a(10) =27247a(11) =32424a(12) =38051a(13) =44128a(14) =50655a(15) =57632a(16) =65059a(17) =72936a(18) =81263a(19) =90040a(20) =99267a(21) =108944a(22) =119071a(23) =129648a(24) =140675a(25) =152152a(26) =164079a(27) =176456a(28) =189283a(29) =202560