490313

Properties

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n+1)/3.at n=22A048038
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n+2)/3.at n=22A048071
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n+3)/3.at n=22A048082
• Primes among partial sums of floor(Pi*prime(k)), k=1,2,3,....at n=15A117503
• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-0111 pattern in any orientation.at n=11A146725
• a(n) = binomial(n+8,8) - 1.at n=15A165618
• Prime numbersat n=40793