428256
domain: N
Appears in sequences
- Numbers n such that there exists an x!=n that makes {n,n,x} an amicable multiset.at n=21A259302
- Abundant numbers n such that sigma(sigma(n) - 2*n) = sigma(n).at n=23A292365
- a(0) = 1; a(n) = (1/n) * Sum_{k=1..n} binomial(n,k)^2 * k^3 * a(n-k).at n=6A337591
- Integers k such that there exists an integer 0<m<k such that sigma(k) = sigma(m) = m + 2*k.at n=12A383239