823542

Appears in sequences

• a(n) = 7^n-1.at n=7A024075
• Numbers that are repdigits in base 7.at n=42A048332
• a(n) = n^n - 1.at n=6A048861
• Moebius transform of n^n.at n=6A062793
• J_n(n), where J is the Jordan function, J_n(n) = n^n product{p|n}(1 - 1/p^n), the product is over the distinct primes, p, dividing n.at n=6A067858
• Jordan function J_7(n).at n=6A069092
• Numbers of the form p^p - 1, where p is a prime.at n=3A088730
• Sum of totient function values of powers of n, as exponent runs from 1 to n.at n=6A091262
• Numbers of the form Abs[m^m - n^n], where integers m,n>0.at n=21A124076
• Difference of two positive 7th powers.at n=21A181126
• Numbers of the form i*7^j-1 (i=1..6, j >= 0).at n=42A181303
• Monotonic ordering of nonnegative differences 7^i-5^j, for 40>= i>=0, j>=0.at n=38A192196
• Number of 0..6 arrays of length n avoiding the consecutive pattern 0..6.at n=6A206453
• a(n) = n^7 - 1.at n=6A258808
• a(n) = Sum_{d|n, n/d==1 mod 4} d^7 - Sum_{d|n, n/d==3 mod 4} d^7.at n=6A321831
• Numbers k such that either (a) k-1=i^m for some i and m >= 3 and k+1 is a prime, or (b) k-1 is a prime and k+1 = i^m for some i and m >= 3.at n=34A329595
• Least positive number k such that n^n divides k*(k+1)/2.at n=6A342930