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

A390237

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

Terms

    a(0) =1a(1) =3a(2) =13a(3) =71a(4) =445a(5) =3040a(6) =21998a(7) =165801a(8) =1287993a(9) =10240870a(10) =82939364a(11) =681829854a(12) =5674948844a(13) =47726973679a(14) =404963281675

External references