261273600

Appears in sequences

• Number of primitive polynomials of degree n over GF(7).at n=12A027743
• Number of double-free subsets of {1, 2, ..., n}.at n=34A050291
• 1/1, 2*3/lcm(2,3), 4*5*6/lcm(4,5,6), 7*8*9*10/lcm(7,8,9,10), ...at n=16A093453
• Bishops on an n X n board (see Robinson paper for details).at n=22A122748
• Product of the nonzero digital products of all the numbers 1 to n (a 'total digital-product factorial' in base 10).at n=15A131451
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} with maximal number of initial entries of the same parity equal to k (1 <= k <= ceiling(n/2)).at n=36A152878
• a(n) = Sum (J(p): p is a permutation of {1,2,...,n}), where J(p) is the number of j <= ceiling(n/2) such that p(j) + p(n+1-j) = n+1.at n=11A155519
• Denominators of a series leading to Euler's constant gamma.at n=7A262235