Indices of heptagonal numbers (A000566) which are also centered square numbers (A001844).

A254228

Indices of heptagonal numbers (A000566) which are also centered square numbers (A001844).

Terms

    a(0) =1a(1) =41a(2) =185a(3) =13105a(4) =59473a(5) =4219673a(6) =19150025a(7) =1358721505a(8) =6166248481a(9) =437504104841

External references