Centered 16-gonal numbers.

Terms

a(0) =1a(1) =17a(2) =49a(3) =97a(4) =161a(5) =241a(6) =337a(7) =449a(8) =577a(9) =721a(10) =881a(11) =1057a(12) =1249a(13) =1457a(14) =1681a(15) =1921a(16) =2177a(17) =2449a(18) =2737a(19) =3041a(20) =3361a(21) =3697a(22) =4049a(23) =4417a(24) =4801a(25) =5201a(26) =5617a(27) =6049a(28) =6497a(29) =6961