329554457

Appears in sequences

• Cyclotomic polynomials at x=7.at n=11A019325
• Cyclotomic polynomials at x = -7.at n=22A020506
• Gaussian binomial coefficients [ n,10 ] for q = 7.at n=1A022239
• a(n) = (7^n - 1)/6.at n=11A023000
• Sublattices of index n in generic 11-dimensional lattice.at n=6A038998
• a(n) = Sum_{j=0..10} n^j.at n=7A060885
• 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=10A064083
• Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) is the sum of k-th powers of divisors of n; m=10.at n=6A068027
• Numbers of the form (7^{mr}-1)/(7^r-1) for positive integers m, r.at n=27A076286
• a(n) = (1/6) * (7^(n+1) - 3*(-1)^n + 2).at n=10A102303
• Values of repunits with odd length L in base (L+3)/2 representation.at n=5A125119
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 12.at n=6A160960