Expansion of g/(1 + x^2*g), where g = 1+x*g^4 is the g.f. of A002293.

A387639

Expansion of g/(1 + x^2*g), where g = 1+x*g^4 is the g.f. of A002293.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =20a(4) =132a(5) =920a(6) =6758a(7) =51513a(8) =403613a(9) =3230794a(10) =26307826a(11) =217236823a(12) =1814829574a(13) =15311195731a(14) =130268265792

External references