G.f.: 1 = Sum_{n>=0} a(n)*x^n*(1-x)^(n+1)/(1 + (n+1)*x)^(2*n+1).

A210097

G.f.: 1 = Sum_{n>=0} a(n)*x^n*(1-x)^(n+1)/(1 + (n+1)*x)^(2*n+1).

Terms

    a(0) =1a(1) =2a(2) =14a(3) =180a(4) =3464a(5) =90018a(6) =2968968a(7) =119252060a(8) =5664108920a(9) =311212995732

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