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

A391306

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =7a(4) =31a(5) =152a(6) =790a(7) =4271a(8) =23767a(9) =135221a(10) =782968a(11) =4598804a(12) =27332956a(13) =164081764a(14) =993424142a(15) =6059089903a(16) =37193922431a(17) =229612233883

External references