a(n) = [x^n] exp(-Sum_{k>=1} x^k/(k*(1 - x^k)^n)).

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =-3a(4) =-4a(5) =30a(6) =274a(7) =1841a(8) =9358a(9) =32463a(10) =-41557a(11) =-2265846a(12) =-28939286a(13) =-272101778a(14) =-2038274408a(15) =-10494221259a(16) =9056975574