Octagonal numbers (A000567) that are also centered square numbers (A001844).

A254896

Octagonal numbers (A000567) that are also centered square numbers (A001844).

Terms

    a(0) =1a(1) =481a(2) =8321a(3) =4617761a(4) =79897441a(5) =44339739841a(6) =767175219361

External references