1056000

Appears in sequences

• Number of permutations of {1,2,...,n} that result in a binary search tree with the minimum possible height.at n=11A076615
• Molecular topological indices of the square graphs.at n=10A192839
• Number T(n,k) of permutations of {1,2,...,n} that result in a binary search tree of height k; triangle T(n,k), k>=0, k<=n<=2^k-1, read by columns.at n=16A244108
• Numbers n such that phi(n) * tau(n) divides n^2, but neither tau(n) nor phi(n) divides n.at n=30A287800
• Coefficients T(n,k) of x^n*y^(n-k)*z^k in function A = A(x,y,z) such that A = 1 + x*B*C, B = 1 + y*C*A, and C = 1 + z*A*B, as a triangle read by rows.at n=58A323324
• Coefficients T(n,k) of x^n*y^(n-k)*z^k in function A = A(x,y,z) such that A = 1 + x*B*C, B = 1 + y*C*A, and C = 1 + z*A*B, as a triangle read by rows.at n=62A323324
• Number of defective (binary) heaps on n elements where four ancestor-successor pairs do not have the correct order.at n=11A324065