241200

Appears in sequences

• Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 19 (most significant digit on right).at n=41A029512
• Triangle T(n, k) = k*(n-1)! - k!, read by rows.at n=41A137260
• Coreful triperfect numbers: numbers k such that csigma(k) = 3*k, where csigma(k) is the sum of the coreful divisors of k (A057723).at n=18A364990
• a(n) is the denominator of Sum_{k = 1..n} 1 / (k*A374663(k)).at n=6A375516
• Exponential abundant numbers that are not exponential unitary abundant.at n=33A391085