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

A391405

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

Terms

    a(0) =1a(1) =1a(2) =7a(3) =30a(4) =153a(5) =805a(6) =4397a(7) =24647a(8) =141020a(9) =820201a(10) =4835029a(11) =28823700a(12) =173471074a(13) =1052554765a(14) =6431805843a(15) =39546649026a(16) =244489418103

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