Integers k such that 3k+1 and 6k+1 are both squares.
A247215
Integers k such that 3k+1 and 6k+1 are both squares.
Terms
- a(0) =0a(1) =8a(2) =280a(3) =9520a(4) =323408a(5) =10986360a(6) =373212840a(7) =12678250208a(8) =430687294240
External references
- oeis: A247215