Values of k such that 2*k-1 and 5*k-1 are both perfect squares.
A274544
Values of k such that 2*k-1 and 5*k-1 are both perfect squares.
Terms
- a(0) =1a(1) =13a(2) =925a(3) =18241a(4) =1333345a(5) =26303005a(6) =1922682061a(7) =37928914465
External references
- oeis: A274544