11404800

Appears in sequences

• a(n) = (2n)! * B_n, where B_n = n-th Bernoulli number.at n=6A130105
• a(n) = number of elements of order n in simple group Alt(12) of order 239500800.at n=20A145437
• Array T(n,m)= (n*m)!*Beta(n, m) read by antidiagonals.at n=22A177847
• Array T(n,m)= (n*m)!*Beta(n, m) read by antidiagonals.at n=26A177847
• Number of permutations of [2n] in which the size of the last cycle is n and the cycles are ordered by increasing smallest elements.at n=6A322450
• a(n) = (2*n)! / CatalanNumber(n - 1) for n >= 1 and a(0) = 1.at n=6A344057