197721

Appears in sequences

• E.g.f. A(x) satisfies: [x^n] A(x)^(n*(n+1)) = 2*n * [x^(n-1)] A(x)^(n*(n+1)) for n>=1.at n=5A300873
• Expansion of g.f. A(x) satisfying A(x)^2 = A( x*(1+x)*A(x) ).at n=15A374572