263363788800
domain: N
Appears in sequences
- a(n) = 2*(n!)^2.at n=9A048617
- Size of the automorphism group of the group S_n x S_n (where S_n is the symmetric group).at n=8A063965
- Order of the subgroup of the symmetric group S_n generated by the cycles (1,3) and (1,2,3,...,n).at n=15A069660
- Array used for numerators of g.f.s for column sequences of array A078741 ((3,3)-Stirling2).at n=23A089517
- a(n) = 2(m!)^2 for n = 2m and m!(m+1)! for n = 2m+1.at n=18A092186
- Product of the nonzero digital products of all the numbers 1 to n (a 'total digital-product factorial' in base 10).at n=19A131451
- Number of permutations of {1,2,...,n} with all odd entries preceding all even entries or all even entries preceding all odd entries.at n=18A152875
- Number of permutations of length n that possess the maximal sum of distances between contiguous elements.at n=20A328378