a(n) = 9*n^2 + 39*n + 83.

Terms

a(0) =83a(1) =131a(2) =197a(3) =281a(4) =383a(5) =503a(6) =641a(7) =797a(8) =971a(9) =1163a(10) =1373a(11) =1601a(12) =1847a(13) =2111a(14) =2393a(15) =2693a(16) =3011a(17) =3347a(18) =3701a(19) =4073a(20) =4463a(21) =4871a(22) =5297a(23) =5741a(24) =6203a(25) =6683a(26) =7181a(27) =7697a(28) =8231a(29) =8783