153780

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n+2)/3.at n=30A048075
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n+3)/3.at n=30A048086
• The hyper-Wiener index of the linear phenylene with n hexagons.at n=9A224455