697426329600
domain: N
Appears in sequences
- Denominators of coefficients for central differences M_{3}'^(2*n+1).at n=7A002677
- Denominator of 2*Stirling_2(n,2)/n!.at n=15A002679
- a(n) = n! *((-1)^n + 2*n + 3)/4.at n=14A052558
- Expansion of e.g.f. (1+x-x^2)/((1-x)*(1-x^2)).at n=14A052689
- Number of integers in {1, 2, ..., n!} that are coprime to n.at n=14A074930
- Bishops on an n X n board (see Robinson paper for details).at n=28A122748
- Triangle read by rows: T(n,k) = (n + 1)*(n + k)!.at n=35A143085
- 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=14A155519
- a(n) = 8 * n!.at n=13A159038
- a(n) = (n+1)*(n-1)!/2.at n=12A171005
- Denominators of coefficients in expansion of 2/(1 + cos(sqrt(x))).at n=7A279110
- Denominators of coefficients in expansion of (2 cos x)/(1 + cos(sqrt(x))).at n=7A279240
- a(n) = n*(2*(n-1))! for n > 0, a(0) = 1.at n=8A327882
- a(n) = n! / (6 * floor(n/3)).at n=13A356012
- Triangle read by rows: T(n, k) = (-1)^k*Product_{j=0..k-1} (j - n)*(j + n), for 0 <= k <= n.at n=43A370707