a(n) = 121*n^2 + 11.

Terms

a(0) =11a(1) =132a(2) =495a(3) =1100a(4) =1947a(5) =3036a(6) =4367a(7) =5940a(8) =7755a(9) =9812a(10) =12111a(11) =14652a(12) =17435a(13) =20460a(14) =23727a(15) =27236a(16) =30987a(17) =34980a(18) =39215a(19) =43692a(20) =48411a(21) =53372a(22) =58575a(23) =64020a(24) =69707a(25) =75636a(26) =81807a(27) =88220a(28) =94875a(29) =101772