Expansion of e.g.f. arctanh(x)/cos(x) (odd powers only).

A302543

Expansion of e.g.f. arctanh(x)/cos(x) (odd powers only).

Terms

    a(0) =1a(1) =5a(2) =69a(3) =2001a(4) =104073a(5) =8723549a(6) =1088372557a(7) =190057979177

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