a(n) = n^2 + n + 5.

Terms

a(0) =5a(1) =7a(2) =11a(3) =17a(4) =25a(5) =35a(6) =47a(7) =61a(8) =77a(9) =95a(10) =115a(11) =137a(12) =161a(13) =187a(14) =215a(15) =245a(16) =277a(17) =311a(18) =347a(19) =385a(20) =425a(21) =467a(22) =511a(23) =557a(24) =605a(25) =655a(26) =707a(27) =761a(28) =817a(29) =875