67368421

Appears in sequences

• Triangle of Gaussian binomial coefficients [ n,k ] for q = 20.at n=29A022184
• a(n) = 1111111 in base n.at n=19A053716
• a(n) = (20^n - 1)/19.at n=7A064108
• a(n) = 1 + sigma(n) + sigma(n)^2 + sigma(n)^3 + sigma(n)^4 + sigma(n)^5 + sigma(n)^6.at n=18A259251