Numbers n such that the sum of the octagonal numbers N(n) and N(n+1) is equal to another octagonal number.

A251895

Numbers n such that the sum of the octagonal numbers N(n) and N(n+1) is equal to another octagonal number.

Terms

    a(0) =0a(1) =30a(2) =368a(3) =34814a(4) =424864a(5) =40175518a(6) =490292880a(7) =46362513150a(8) =565797558848

External references