Numbers k such that 8*k^2 + 8*k - 7 is a square.

Terms

a(0) =1a(1) =7a(2) =43a(3) =253a(4) =1477a(5) =8611a(6) =50191a(7) =292537a(8) =1705033a(9) =9937663a(10) =57920947a(11) =337588021a(12) =1967607181a(13) =11468055067a(14) =66840723223a(15) =389576284273