E.g.f. (1-2x)/(1-2x-x^3).

A052639

E.g.f. (1-2x)/(1-2x-x^3).

Terms

    a(0) =1a(1) =0a(2) =0a(3) =6a(4) =48a(5) =480a(6) =6480a(7) =100800a(8) =1774080a(9) =35199360a(10) =776563200a(11) =18840729600a(12) =498640665600

External references