205011

Appears in sequences

• Expansion of (1 - 3*x - sqrt((1-3*x)^2 - 4*3*x^2))/(2*3*x^2).at n=8A107264
• Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 3 (n >= 0, k >= 0).at n=15A120983
• Number of strings of numbers x(i=1..n) in 0..n with sum i^2*x(i)^3 equal to n^5.at n=9A184310
• Triangle read by rows, T(n,k) for 0<=k<=n, generalizes the colored Motzkin paths of A107264.at n=36A201638