a(n) = 12*n^2 + 22*n + 11.

Terms

a(0) =11a(1) =45a(2) =103a(3) =185a(4) =291a(5) =421a(6) =575a(7) =753a(8) =955a(9) =1181a(10) =1431a(11) =1705a(12) =2003a(13) =2325a(14) =2671a(15) =3041a(16) =3435a(17) =3853a(18) =4295a(19) =4761a(20) =5251a(21) =5765a(22) =6303a(23) =6865a(24) =7451a(25) =8061a(26) =8695a(27) =9353a(28) =10035a(29) =10741