705895

Appears in sequences

• a(n) = n*7^n + 1.at n=6A050919
• a(0) = 1, a(1) = 7; for n>=2 a(n) is the number of degree-n monic reducible polynomials over GF(7), i.e., a(n) = 7^n - A001693(n).at n=7A058822
• a(n) = 6*7^n+1.at n=6A199483
• a(n) = Sum_{d|n} phi(d^d), where phi(n) is the Euler totient function A000010(n).at n=6A226459
• a(n) = Sum_{d|n} phi(d^n), where phi() is the Euler totient function (A000010).at n=6A321349
• a(n) = (1/n) * Sum_{k=1..n} n^(n/gcd(n, k)).at n=6A332621