1209600

Appears in sequences

• Number of discordant permutations.at n=23A000562
• a(n) = n! / 3.at n=7A002301
• Triangle of coefficients in expansion of D^n (tan x) in powers of tan x.at n=33A008293
• Denominators of Taylor series for 1/(sin x + tan x).at n=4A009724
• Number of aperiodic necklaces with n labeled beads of 2 colors.at n=7A032321
• Products of distinct factorials.at n=37A058295
• Triangle n!/(n-k), 1 <= k < n, read by rows.at n=42A058298
• Denominators of nonzero numbers appearing in the Euler-Maclaurin summation formula. (See A060054 for the definition of these numbers.)at n=4A060055
• Denominator of (-1)^n*n!*(E(n,2)-E(n,1)*E(n-1,1)) where E(n,x) = Sum_{k=0..n} (-1)^k*x^k/k!.at n=13A065953
• a(n) = Product_{i=2..n} A001222(i) * Sum_{i=2..n} 1/A001222(i).at n=21A067580
• Signed variant of A077012.at n=52A078921
• n! divided by prime whose index is the integer part of log(n).at n=7A089057
• Denominator of (5/2)*Sum_{i=1..n} (-1)^(i-1)/(i^3*C(2*i,i)).at n=5A089639
• Triangle read by rows: T(n,k) is the number of permutations p of [n] having length of first run equal to k.at n=46A092582
• Triangle read by rows: T(n,k) is the number of permutations p of [n] in which the length of the longest initial segment avoiding both the 132- and the 231-pattern is equal to k.at n=46A092594
• Triangle read by rows: T(n,k) is the number of permutations p of [n] in which the length of the longest initial segment avoiding both the 132- and the 231-pattern is equal to k.at n=47A092594
• Triangle read by rows: T(n,k) is the number of permutations p of [n] in which the length of the longest initial segment avoiding both the 132- and the 321-pattern is equal to k.at n=46A092741
• Least product of the parts of the partitions of n where that product has the maximum number of divisors.at n=42A092991
• Triangle read by rows: T(n,k) is the number of permutations p of [n] in which the length of the longest initial segment avoiding the 123-, the 132- and the 231-pattern is equal to k.at n=47A094112
• Triangle read by rows: T(n,k), the k-th term of the n-th row, is the product of all numbers from 1 to n except k: T(n,k) = n!/k.at n=47A094310