49659541

Appears in sequences

• Triangle of Gaussian binomial coefficients [ n,k ] for q = 19.at n=29A022183
• Number of sublattices of index n in generic 7-dimensional lattice.at n=18A038994
• a(n) = 1111111 in base n.at n=18A053716
• 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=6.at n=18A068023
• a(n)=(19^n - 1)/(9*2^(3 - 2*Mod[n, 2])).at n=7A152438
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 8.at n=18A160897
• a(n) = (19^n-1)/18.at n=7A218722