Expansion of g.f. cosh(9*arctanh(4*sqrt(x))).

A383928

Expansion of g.f. cosh(9*arctanh(4*sqrt(x))).

Terms

    a(0) =1a(1) =648a(2) =76896a(3) =4601088a(4) =194102784a(5) =6662320128a(6) =199818854400

External references