a(n) = 2*n^2 + 18*n + 7.

Terms

a(0) =27a(1) =51a(2) =79a(3) =111a(4) =147a(5) =187a(6) =231a(7) =279a(8) =331a(9) =387a(10) =447a(11) =511a(12) =579a(13) =651a(14) =727a(15) =807a(16) =891a(17) =979a(18) =1071a(19) =1167a(20) =1267a(21) =1371a(22) =1479a(23) =1591a(24) =1707a(25) =1827a(26) =1951a(27) =2079a(28) =2211a(29) =2347