Numbers n such that the sum of the hexagonal numbers X(n) and X(n+1) is equal to the heptagonal number H(m) for some m.

A252985

Numbers n such that the sum of the hexagonal numbers X(n) and X(n+1) is equal to the heptagonal number H(m) for some m.

Terms

    a(0) =1a(1) =579a(2) =1870a(3) =835278a(4) =2696899a(5) =1204470657a(6) =3888926848

External references