a(0) = 1, a(n) = n^2 + 2 for n > 0.

Terms

a(0) =1a(1) =3a(2) =6a(3) =11a(4) =18a(5) =27a(6) =38a(7) =51a(8) =66a(9) =83a(10) =102a(11) =123a(12) =146a(13) =171a(14) =198a(15) =227a(16) =258a(17) =291a(18) =326a(19) =363a(20) =402a(21) =443a(22) =486a(23) =531a(24) =578a(25) =627a(26) =678a(27) =731a(28) =786a(29) =843