63775

Appears in sequences

• a(n) = n*(4*n^2 + 2*n + 1).at n=25A110451
• G.f. A(x) satisfies A(A(A(..(A(x))..))) = B(x) (12th self-COMPOSE of A) such that the coefficients of B(x) consist only of numbers {1,2,3,..,12}, with B(0) = 0.at n=5A112125
• a(n) = number of ways to choose a collection C of subsets of U = [1,2,...,n] such that Union_{S in C} = U, Intersection_{S in C} = empty set.at n=4A131288
• Number of sets in the geometry determined by the Hausdorff metric at each location between two sets defined by a complete bipartite graph K(3,n) (with n at least 4) missing three edges, where exactly two of the removed edges are incident to the same vertex in the 3-point set but none of the removed edges are incident to the same vertex in the other set.at n=3A340436