66547

Appears in sequences

• Numbers whose base-3 representation has exactly 11 runs.at n=28A043591
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= n/3.at n=18A047194
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= (n-1)/3.at n=18A048006
• Duplicate of A047194.at n=18A048039
• Interprimes (A024675) which are of the form s*prime, s=13.at n=27A075288
• Natural growth of an aliquot sequence driven by a perfect number 2^(p-1)*((2^p)-1), but starting at 27.at n=17A216224
• a(n) = p(n)*p(n+1)*(p(n+1) - p(n)) - 1, where p(n) = prime(n).at n=30A383241