38915

Appears in sequences

• Numbers k such that j(k)*phi(k) = sigma(phi(k)), j(k) = A033831(k).at n=23A033856
• a(n) is the smallest k such that number of non-unitary prime divisors of central binomial coefficient, A001405(k) = C(k, floor(k/2)) equals n.at n=28A081394
• Numbers whose set of base 6 digits is {0,5}.at n=35A097252
• a(n) = Sum_{i=0..n} Sum_{j=0..n} 2^max(i,j).at n=10A339771