a(n) = n^2 + n + 6.

Terms

a(0) =6a(1) =8a(2) =12a(3) =18a(4) =26a(5) =36a(6) =48a(7) =62a(8) =78a(9) =96a(10) =116a(11) =138a(12) =162a(13) =188a(14) =216a(15) =246a(16) =278a(17) =312a(18) =348a(19) =386a(20) =426a(21) =468a(22) =512a(23) =558a(24) =606a(25) =656a(26) =708a(27) =762a(28) =818a(29) =876