a(n) = 3*n^2 + 6*n + 8.

Terms

a(0) =8a(1) =17a(2) =32a(3) =53a(4) =80a(5) =113a(6) =152a(7) =197a(8) =248a(9) =305a(10) =368a(11) =437a(12) =512a(13) =593a(14) =680a(15) =773a(16) =872a(17) =977a(18) =1088a(19) =1205a(20) =1328a(21) =1457a(22) =1592a(23) =1733a(24) =1880a(25) =2033a(26) =2192a(27) =2357a(28) =2528a(29) =2705