-2172

Appears in sequences

• Expansion of g.f. 1/((1 - x)^2*(1 - 3*x + 3*x^2)).at n=11A279231
• G.f. A(x) satisfies: A(x) = x * (1 + (1/(1 + x)) * (A(x/(1 + x)) + A(x^2/(1 + x)^2) + A(x^3/(1 + x)^3) + ...)).at n=11A308024