Expansion of g^2/(1 + x^3*g^3), where g = 1+x*g^4 is the g.f. of A002293.
A391458
Expansion of g^2/(1 + x^3*g^3), where g = 1+x*g^4 is the g.f. of A002293.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =51a(4) =335a(5) =2364a(6) =17511a(7) =134303a(8) =1057446a(9) =8498115a(10) =69424964a(11) =574844733a(12) =4813486921a(13) =40690941990a(14) =346798845213
External references
- oeis: A391458