Indices i such that 2*A000326(i)+1 is also a pentagonal number.

A174685

Indices i such that 2*A000326(i)+1 is also a pentagonal number.

Terms

    a(0) =0a(1) =75a(2) =244a(3) =86359a(4) =281384a(5) =99658019a(6) =324716700a(7) =115005267375a(8) =374722790224

External references