Expansion of g^2/(1 - x*g)^4, where g = 1+x*g^3 is the g.f. of A001764.

A391173

Expansion of g^2/(1 - x*g)^4, where g = 1+x*g^3 is the g.f. of A001764.

Terms

    a(0) =1a(1) =6a(2) =29a(3) =138a(4) =678a(5) =3466a(6) =18369a(7) =100320a(8) =561440a(9) =3205178a(10) =18598797a(11) =109395610a(12) =650819223a(13) =3909560406a(14) =23681726775a(15) =144490912866a(16) =887196759546

External references