Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to an octagonal number N(m) for some m.

A251963

Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to an octagonal number N(m) for some m.

Terms

    a(0) =0a(1) =14a(2) =208a(3) =2910a(4) =40544a(5) =564718a(6) =7865520a(7) =109552574a(8) =1525870528a(9) =21252634830a(10) =296011017104

External references