146648

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n-2)/3.at n=21A048025
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n-3)/3.at n=21A048036
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 1, -1), (1, 1, 0)}.at n=10A149000
• The number of subsets X of Zn such that for all u, v in X, u+v is not in X.at n=31A206702