Expansion of e.g.f. sec(log(1 + x)) + tan(log(1 + x)).

A306336

Expansion of e.g.f. sec(log(1 + x)) + tan(log(1 + x)).

Terms

    a(0) =1a(1) =1a(2) =0a(3) =1a(4) =-2a(5) =10a(6) =-50a(7) =320a(8) =-2340a(9) =19640a(10) =-184900a(11) =1932500a(12) =-22187200a(13) =277576000a(14) =-3757884000a(15) =54732418000a(16) =-853278998000

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