Expansion of e.g.f. exp(cosh(x)/cos(x)-1) (even powers only).

A302579

Expansion of e.g.f. exp(cosh(x)/cos(x)-1) (even powers only).

Terms

    a(0) =1a(1) =2a(2) =24a(3) =632a(4) =28784a(5) =1991552a(6) =193410624a(7) =24993180032

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