Expansion of g^2/(1 + x^3*g^2), where g = 1+x*g^4 is the g.f. of A002293.
A391456
Expansion of g^2/(1 + x^3*g^2), where g = 1+x*g^4 is the g.f. of A002293.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =51a(4) =336a(5) =2372a(6) =17571a(7) =134757a(8) =1060967a(9) =8526011a(10) =69649968a(11) =576686912a(12) =4828760456a(13) =40818936354a(14) =347881337345
External references
- oeis: A391456