E.g.f. A(x) satisfies A(x) = 1/( 1 - x * cosh(x) * A(x)^2 ).

A381445

E.g.f. A(x) satisfies A(x) = 1/( 1 - x * cosh(x) * A(x)^2 ).

Terms

    a(0) =1a(1) =1a(2) =6a(3) =75a(4) =1392a(5) =34925a(6) =1108080a(7) =42562807a(8) =1920796416a(9) =99628495353

External references