Series expansion of the reciprocal of the generating function of A068432.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-1a(4) =0a(5) =0a(6) =-1a(7) =1a(8) =0a(9) =0a(10) =2a(11) =-3a(12) =3a(13) =-3a(14) =-1a(15) =3a(16) =-6a(17) =9a(18) =-6a(19) =4a(20) =3a(21) =-10a(22) =12a(23) =-14a(24) =3a(25) =11a(26) =-24a(27) =38a(28) =-33a(29) =19