G.f. A(x) satisfies: A(x) = 1 - x * A(x/(1 - x)) / (1 - x)^3.

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =0a(4) =10a(5) =25a(6) =-11a(7) =-301a(8) =-1040a(9) =-60a(10) =17770a(11) =95359a(12) =146701a(13) =-1513837a(14) =-14210258a(15) =-53101500a(16) =91834402a(17) =2739189073a(18) =19172894377a(19) =46384729811a(20) =-498471972128