87549

Appears in sequences

• Number of 2-element intersecting families whose union is an n-element set.at n=10A053152
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=35A250755
• Number of n-node rooted trees with a forbidden limb of length 8.at n=14A255638
• Number of rooted trees with n nodes such that no more than seven subtrees of the same size extend from the same node.at n=15A318801
• Number of rooted trees with n nodes such that no more than seven isomorphic subtrees extend from the same node.at n=15A318854