Expansion of g.f.: 1 / AGM(1-9*x, sqrt((1-x)*(1-81*x))).

A246923

Expansion of g.f.: 1 / AGM(1-9*x, sqrt((1-x)*(1-81*x))).

Terms

    a(0) =1a(1) =25a(2) =1089a(3) =60025a(4) =3690241a(5) =241025625a(6) =16359689025

External references