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

A391295

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

Terms

    a(0) =1a(1) =2a(2) =6a(3) =27a(4) =132a(5) =677a(6) =3620a(7) =19973a(8) =112854a(9) =649751a(10) =3798238a(11) =22483976a(12) =134507101a(13) =811929189a(14) =4939152539a(15) =30249144245a(16) =186356414752

External references