Numbers k such that the sum of the octagonal numbers O(k), O(k+1), O(k+2) and O(k+3) is equal to the hexagonal number H(m) for some m.

A253120

Numbers k such that the sum of the octagonal numbers O(k), O(k+1), O(k+2) and O(k+3) is equal to the hexagonal number H(m) for some m.

Terms

    a(0) =6a(1) =705a(2) =69196a(3) =6780615a(4) =664431186a(5) =65107475725

External references