1562274

Appears in sequences

• Number of compositions of n into 9 ordered relatively prime parts.at n=18A023034
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= n/3.at n=25A047193
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n-1)/3.at n=25A048005
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n-2)/3.at n=25A048016
• a(n) = binomial(n+8,8) - 1.at n=18A165618