309582

Appears in sequences

• Number of n X 5 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=12A207065
• Numbers n such that there exists an x!=n that makes {n,n,x} an amicable multiset.at n=17A259302
• Numbers n such that the set of prime divisors of n is equal to the set of prime divisors of sum of proper divisors of n while n is not in A027598.at n=25A286876
• Abundant numbers n such that sigma(sigma(n) - 2*n) = sigma(n).at n=19A292365
• Integers k such that there exists an integer 0<m<k such that sigma(k) = sigma(m) = m + 2*k.at n=8A383239