a(n) = n^2 + 1.

Terms

a(0) =1a(1) =2a(2) =5a(3) =10a(4) =17a(5) =26a(6) =37a(7) =50a(8) =65a(9) =82a(10) =101a(11) =122a(12) =145a(13) =170a(14) =197a(15) =226a(16) =257a(17) =290a(18) =325a(19) =362a(20) =401a(21) =442a(22) =485a(23) =530a(24) =577a(25) =626a(26) =677a(27) =730a(28) =785a(29) =842