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

A013566

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

Terms

    a(0) =1a(1) =0a(2) =1a(3) =-9a(4) =64a(5) =-510a(6) =5140a(7) =-62650a(8) =868516a(9) =-13417104a(10) =229831820a(11) =-4334605748a(12) =89205406112

External references