Expansion of e.g.f. sec(x*cosh(x)) (even powers only).

A296740

Expansion of e.g.f. sec(x*cosh(x)) (even powers only).

Terms

    a(0) =1a(1) =1a(2) =17a(3) =481a(4) =26529a(5) =2355841a(6) =304490801a(7) =54346519137

External references