13993643

Appears in sequences

• The right Aurifeuillian factor of k^k - 1 for k congruent to 1 (mod 4) and squarefree.at n=1A230378
• Table read by rows in which row n lists divisors of (p^p-1)/(p-1) where p = prime(n).at n=20A248843
• The right Aurifeuillian factor of p^p - 1, for primes p congruent to 1 (mod 4).at n=1A352732