202601898

Appears in sequences

• Number of irreducible chord diagrams with 2n nodes.at n=10A000699
• Duplicate of A000699.at n=9A051863
• G.f. satisfies: A(x) = G(x/A(x)) where o.g.f. G(x) = A(x*G(x)) = Sum_{n>=0} A001464(n)*x^n.at n=20A172394
• G.f. satisfies: A(x) = G(x/A(x)) where o.g.f. G(x) = A(x*G(x)) = Sum_{n>=0} A000085(n)*x^n.at n=20A172395
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=37A286795
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=45A286796
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section. .at n=28A286798