Numbers n >= 0 such that n^2 + n*(n+1)/2 is a square.
A220186
Numbers n >= 0 such that n^2 + n*(n+1)/2 is a square.
Terms
- a(0) =0a(1) =8a(2) =800a(3) =78408a(4) =7683200a(5) =752875208a(6) =73774087200
External references
- oeis: A220186
A220186
Numbers n >= 0 such that n^2 + n*(n+1)/2 is a square.