G.f. A(x) satisfies x / Series_Reversion(x*A(x)) = (A(x) + 1+x)/2.

A120956

G.f. A(x) satisfies x / Series_Reversion(x*A(x)) = (A(x) + 1+x)/2.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =8a(4) =50a(5) =412a(6) =4120a(7) =47840a(8) =628130a(9) =9164600a(10) =146786980a(11) =2557718352a(12) =48147082520a(13) =973612557504

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