Expansion of g/(1 - x*g)^2, where g = 1+x*g^3 is the g.f. of A001764.

A391168

Expansion of g/(1 - x*g)^2, where g = 1+x*g^3 is the g.f. of A001764.

Terms

    a(0) =1a(1) =3a(2) =10a(3) =39a(4) =172a(5) =827a(6) =4223a(7) =22513a(8) =123906a(9) =698800a(10) =4017611a(11) =23459981a(12) =138753411a(13) =829497070a(14) =5004289494a(15) =30428025015a(16) =186279229008

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