Expansion of g/(1 - x*g^2)^3, where g = 1+x*g^4 is the g.f. of A002293.
A391198
Expansion of g/(1 - x*g^2)^3, where g = 1+x*g^4 is the g.f. of A002293.
Terms
- a(0) =1a(1) =4a(2) =19a(3) =107a(4) =678a(5) =4651a(6) =33710a(7) =254225a(8) =1975179a(9) =15703801a(10) =127164198a(11) =1045202460a(12) =8697646655a(13) =73134066873a(14) =620427087397
External references
- oeis: A391198