Bisection of A001353. Indices of square numbers which are also octagonal.

A028230

Bisection of A001353. Indices of square numbers which are also octagonal.

Terms

    a(0) =1a(1) =15a(2) =209a(3) =2911a(4) =40545a(5) =564719a(6) =7865521a(7) =109552575a(8) =1525870529a(9) =21252634831a(10) =296011017105

External references