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

A391129

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

Terms

    a(0) =1a(1) =2a(2) =8a(3) =36a(4) =177a(5) =920a(6) =4972a(7) =27656a(8) =157283a(9) =910378a(10) =5345408a(11) =31761232a(12) =190616428a(13) =1153815776a(14) =7035931524a(15) =43182501648a(16) =266538732951

External references