Numbers n such that the sum of the heptagonal numbers H(n), H(n+1) and H(n+2) is equal to the pentagonal number P(m) for some m.
A252115
Numbers n such that the sum of the heptagonal numbers H(n), H(n+1) and H(n+2) is equal to the pentagonal number P(m) for some m.
Terms
- a(0) =573a(1) =26951a(2) =59482389a(3) =2794406159
External references
- oeis: A252115