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

A351028

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

Terms

    a(0) =0a(1) =1a(2) =0a(3) =1a(4) =4a(5) =13a(6) =44a(7) =173a(8) =792a(9) =4009a(10) =21608a(11) =122761a(12) =737340a(13) =4696341a(14) =31665076a(15) =224846037a(16) =1672266352a(17) =12976252561a(18) =104816144656a(19) =880061135057

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