9694416

Appears in sequences

• Symmetrical dissections of an n-gon.at n=27A000063
• Expansion of (sqrt(1-4x^2) - sqrt(1-4x))/(2x).at n=15A000912
• Dirichlet convolution of Moebius function mu(n) (A008683) with Catalan numbers (A000108).at n=15A034742