Nonnegative integers n such that 13*n^2 + 13*n + 1 is a square.
A104240
Nonnegative integers n such that 13*n^2 + 13*n + 1 is a square.
Terms
- a(0) =0a(1) =7a(2) =144a(3) =504a(4) =9727a(5) =187560a(6) =654840a(7) =12626287a(8) =243453384a(9) =849982464a(10) =16388911447a(11) =316002305520
External references
- oeis: A104240