1720944

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= n/3.at n=26A048001
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n+1)/3.at n=26A048047
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n+2)/3.at n=26A048080
• Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 1 1 vertically.at n=11A207586