73255

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/5 of the elements are <= n/3.at n=20A047198
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/5 of the elements are <= (n+1)/3.at n=20A048043
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/5 of the elements are <= (n+2)/3.at n=20A048076
• G.f. A(x) satisfies: A( x*A(x) - 2*x*A(x)^2 + x*A(x)^3 ) = x^2.at n=8A272821
• Pierce Expansion of cot(1).at n=20A280094
• Occurrences of decrease of the probability density P(n) of coprime numbers k,m, satisfying 1 <= k <= a(n) and 1 <= m <= a(n), and a(n) congruent to 1 (mod 2) and a(n) not congruent to 3 (mod 6).at n=29A280879