455966

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/4 of the elements are <= (n+1)/3.at n=22A048041
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/4 of the elements are <= (n+2)/3.at n=22A048074
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/4 of the elements are <= (n+3)/3.at n=22A048085