Expansion of g/(1 - x^2*g^2), where g = 1+x*g^4 is the g.f. of A002293.
A391097
Expansion of g/(1 - x^2*g^2), where g = 1+x*g^4 is the g.f. of A002293.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =25a(4) =156a(5) =1065a(6) =7727a(7) =58416a(8) =455097a(9) =3627727a(10) =29445912a(11) =242538753a(12) =2022089118a(13) =17031178367a(14) =144698018623
External references
- oeis: A391097