Expansion of e.g.f. 1 / (1 - x)^cos(x).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =15a(6) =105a(7) =924a(8) =8204a(9) =73461a(10) =700005a(11) =7323976a(12) =84472146a(13) =1064285027a(14) =14492861747a(15) =211738655608