Indices of centered pentagonal numbers (A005891) which are also squares (A000290).

A254332

Indices of centered pentagonal numbers (A005891) which are also squares (A000290).

Terms

    a(0) =1a(1) =3a(2) =22a(3) =96a(4) =817a(5) =3627a(6) =31006a(7) =137712a(8) =1177393a(9) =5229411a(10) =44709910a(11) =198579888a(12) =1697799169a(13) =7540806315a(14) =64471658494a(15) =286352060064

External references