G.f. A(x) satisfies: A(x) = 1 + x^2 * A(x/(1 - 2*x)) / (1 - 2*x).

A351143

G.f. A(x) satisfies: A(x) = 1 + x^2 * A(x/(1 - 2*x)) / (1 - 2*x).

Terms

    a(0) =1a(1) =0a(2) =1a(3) =2a(4) =5a(5) =16a(6) =61a(7) =258a(8) =1177a(9) =5776a(10) =30537a(11) =173394a(12) =1050045a(13) =6732608a(14) =45459493a(15) =322141106a(16) =2390075249a(17) =18525967328a(18) =149684238801

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