4192200

Appears in sequences

• Number of Barlow packings with group P6(bar)m2 that repeat after 2n layers.at n=23A011949
• LCM of unsigned Stirling numbers of the first kind, s(n,k) for 1 <= k <= n; s(n,k) = number of permutations of {1,2,..,n} with k cycles.at n=5A063039
• Denominator of sum{k=1 to n} 1/s(n,k), where s(n,k) is an unsigned Stirling number of the first kind.at n=5A112289
• a(n) is the denominator of Sum_{k=1..n} 1 / Stirling1(n,k).at n=5A354479