444853

Appears in sequences

• a(n) = (n^4 + 2n^3 + 5n^2 + 4)/4.at n=36A123350
• Quasi-Carmichael numbers to exactly five bases.at n=6A257755
• Composite numbers k such that A347381 obtains the same value for all divisors of k that are larger than one, where A347381 is the distance from n to the nearest common ancestor of n and sigma(n) in the Doudna-tree (A005940).at n=22A374219