6906899

Appears in sequences

• One less than number of n-multisets chosen from a 10-set.at n=19A035927
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= n/3.at n=27A047193
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n-1)/3.at n=27A048005
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n+1)/3.at n=27A048038
• a(n) = number of nonempty subsets S of {1,2,...,n} such that (number of nonprimes in S) = (number of primes in S).at n=28A369854