16148168401
domain: N
Appears in sequences
- Cyclotomic polynomials at x=7.at n=13A019325
- Cyclotomic polynomials at x = -7.at n=26A020506
- Gaussian binomial coefficients [ n,12 ] for q = 7.at n=1A022241
- a(n) = (7^n - 1)/6.at n=13A023000
- a(n) = Sum_{j=0..12} n^j.at n=7A060887
- Zsigmondy numbers for a = 7, b = 1: Zs(n, 7, 1) is the greatest divisor of 7^n - 1^n (A024075) that is relatively prime to 7^m - 1^m for all positive integers m < n.at n=12A064083
- a(n) = largest prime factor of 7^n-1.at n=12A074249
- a(n) = largest prime factor of 7^n-1.at n=25A074249
- Primes of the form (7^k-1)/6.at n=1A102170
- a(n) = (1/6) * (7^(n+1) - 3*(-1)^n + 2).at n=12A102303
- Primes of the form Sum[7^i, {i, 0, n}] + 1 - Mod[Sum[7^i, {i, 0, n}], 2].at n=4A102324
- a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 14.at n=6A161010
- Legal generalized repunit prime numbers.at n=27A179625
- Minimal order of degree-n irreducible polynomials over GF(7).at n=12A218358
- Maximum of the smallest prime factors of (i^prime(n)-1)/(i-1), when i runs through all integers in [2, prime(n)].at n=5A247216
- Maximum of the greatest prime factors of (i^prime(n)-1)/(i-1), when i runs through all integers in [2, prime(n)].at n=5A247230
- Primes of the form Phi(k, -7), where Phi is the cyclotomic polynomial.at n=7A291993
- Primes of the form Phi(k, 7), where Phi is the cyclotomic polynomial.at n=2A292011
- Smallest primitive prime factor of 7^n-1.at n=12A379640
- Smallest number with reciprocal of period length n in base 7.at n=13A381494