Expansion of g/(2 - g^2), where g = 1+x*g^2 is the g.f. of A000108.

A391459

Expansion of g/(2 - g^2), where g = 1+x*g^2 is the g.f. of A000108.

Terms

    a(0) =1a(1) =3a(2) =13a(3) =60a(4) =283a(5) =1348a(6) =6454a(7) =30992a(8) =149091a(9) =718044a(10) =3460818a(11) =16688928a(12) =80506606a(13) =388456552a(14) =1874693708a(15) =9048440800a(16) =43677494307a(17) =210848993068

External references