Expansion of g/(1 - x^3*g), where g = 1+x*g^4 is the g.f. of A002293.

A390298

Expansion of g/(1 - x^3*g), where g = 1+x*g^4 is the g.f. of A002293.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =23a(4) =142a(5) =978a(6) =7137a(7) =54163a(8) =423141a(9) =3380062a(10) =27480224a(11) =226641221a(12) =1891545955a(13) =15945663152a(14) =135575825122

External references