a(n) = 11*n^2 + 22*n.

Terms

a(0) =33a(1) =88a(2) =165a(3) =264a(4) =385a(5) =528a(6) =693a(7) =880a(8) =1089a(9) =1320a(10) =1573a(11) =1848a(12) =2145a(13) =2464a(14) =2805a(15) =3168a(16) =3553a(17) =3960a(18) =4389a(19) =4840a(20) =5313a(21) =5808a(22) =6325a(23) =6864a(24) =7425a(25) =8008a(26) =8613a(27) =9240a(28) =9889a(29) =10560