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

A390331

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

Terms

    a(0) =1a(1) =3a(2) =11a(3) =53a(4) =310a(5) =2041a(6) =14461a(7) =107574a(8) =828351a(9) =6545159a(10) =52761856a(11) =432188645a(12) =3586899884a(13) =30096362593a(14) =254877867765

External references