Expansion of e.g.f. 1/(1 - x*cosh(x)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =9a(4) =48a(5) =305a(6) =2400a(7) =22057a(8) =230272a(9) =2708001a(10) =35412480a(11) =509177801a(12) =7986468864a(13) =135718942801