203898

Appears in sequences

• Numbers k such that sigma(k) = 2*sigma(k+1).at n=36A163193
• Number of arrays of median of three adjacent elements of some length n+2 0..3 array, with no adjacent equal elements in the latter.at n=11A229007
• Numbers k such that the average of the divisors of k and k+1 is the same.at n=28A238380
• Numbers m such that tau(m) = 2 * tau(m + 1) and simultaneously sigma(m) = 2 * sigma(m + 1), where tau(k) = A000005(k) and sigma(k) = A000203(k).at n=4A353034