Centered 17-gonal numbers: (17*n^2 - 17*n + 2)/2.

Terms

a(0) =1a(1) =18a(2) =52a(3) =103a(4) =171a(5) =256a(6) =358a(7) =477a(8) =613a(9) =766a(10) =936a(11) =1123a(12) =1327a(13) =1548a(14) =1786a(15) =2041a(16) =2313a(17) =2602a(18) =2908a(19) =3231a(20) =3571a(21) =3928a(22) =4302a(23) =4693a(24) =5101a(25) =5526a(26) =5968a(27) =6427a(28) =6903a(29) =7396