G.f. A(x) satisfies: 2 = Sum_{n=-oo..+oo} x^(2*n) * (A(x) - x^n)^n * (1 - x^n*A(x))^n.

A354963

G.f. A(x) satisfies: 2 = Sum_{n=-oo..+oo} x^(2*n) * (A(x) - x^n)^n * (1 - x^n*A(x))^n.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =10a(4) =36a(5) =118a(6) =452a(7) =1652a(8) =6534a(9) =25642a(10) =103712a(11) =422734a(12) =1745742a(13) =7276826a(14) =30571248a(15) =129390958a(16) =550897752a(17) =2358688884a(18) =10147228932a(19) =43845016012a(20) =190190489188a(21) =827925869688

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