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

A391465

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

Terms

    a(0) =1a(1) =3a(2) =19a(3) =139a(4) =1085a(5) =8792a(6) =73013a(7) =616990a(8) =5282341a(9) =45687264a(10) =398395484a(11) =3497464615a(12) =30877285755a(13) =273909968248

External references