Expansion of c(x^2-x^3), c(x) the g.f. of A000108.

Terms

a(0) =1a(1) =0a(2) =-1a(3) =1a(4) =2a(5) =-4a(6) =-3a(7) =15a(8) =-1a(9) =-51a(10) =42a(11) =154a(12) =-274a(13) =-372a(14) =1341a(15) =405a(16) =-5599a(17) =2783a(18) =20295a(19) =-27313a(20) =-61139a(21) =160797a(22) =124462a(23) =-767702a(24) =94964a(25) =3145986a(26) =-2930086a(27) =-10956466a(28) =21290868a(29) =29513156