G.f. satisfies A(x) = exp( Sum_{k>=1} A(x^k) * x^k/(k * (1 - 2*x^k)) ).

A363545

G.f. satisfies A(x) = exp( Sum_{k>=1} A(x^k) * x^k/(k * (1 - 2*x^k)) ).

Terms

    a(0) =1a(1) =1a(2) =4a(3) =14a(4) =54a(5) =206a(6) =823a(7) =3312a(8) =13619a(9) =56643a(10) =238569a(11) =1014443a(12) =4352038a(13) =18809992a(14) =81843021a(15) =358186642a(16) =1575810191a(17) =6965004499a(18) =30914431131a(19) =137736012285a(20) =615785575785

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