106661318400
domain: N
Appears in sequences
- a(n) = floor(n!/R(n)!), where R(n) = digit reversal of n (A004086).at n=20A068158
- Product of next n composite numbers.at n=6A071221
- a(n) is the number of digraphs (not allowing loops) with vertices 1,2,...,n that have a unique Eulerian tour (up to cyclic shift).at n=9A102693
- Number of permutations of [n] beginning with at least ceiling(n/2) ascents.at n=21A262034