Expansion of e.g.f. log(1+x*cos(x)).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-1a(4) =6a(5) =-31a(6) =120a(7) =-337a(8) =-784a(9) =24705a(10) =-288000a(11) =2451679a(12) =-14032128a(13) =-17936543a(14) =2173889536a(15) =-42895630065a(16) =583266662400