Expansion of g/(1 + x^2*g^2), where g = 1+x*g^4 is the g.f. of A002293.
A391323
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) =3a(3) =19a(4) =126a(5) =883a(6) =6501a(7) =49624a(8) =389219a(9) =3118063a(10) =25405808a(11) =209894543a(12) =1754221320a(13) =14805022999a(14) =125999049473
External references
- oeis: A391323