Expansion of (g/(2 - g^2))^2, where g = 1+x*g^2 is the g.f. of A000108.

A391493

Expansion of (g/(2 - g^2))^2, where g = 1+x*g^2 is the g.f. of A000108.

Terms

    a(0) =1a(1) =6a(2) =35a(3) =198a(4) =1095a(5) =5954a(6) =31954a(7) =169716a(8) =893787a(9) =4673874a(10) =24295374a(11) =125644284a(12) =646887382a(13) =3317570004a(14) =16955610148a(15) =86391773992a(16) =438970149267

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