Let x^3/(-1-x+x^3)=Sum[b[n]*x^n/n1,{n,0,Infinity}]; a(n) = Abs[b[n]].

A109583

Let x^3/(-1-x+x^3)=Sum[b[n]*x^n/n1,{n,0,Infinity}]; a(n) = Abs[b[n]].

Terms

    a(0) =0a(1) =0a(2) =0a(3) =6a(4) =24a(5) =120a(6) =0a(7) =5040a(8) =80640a(9) =725760a(10) =3628800a(11) =39916800a(12) =1437004800a(13) =24908083200a(14) =261534873600a(15) =0

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