1857945600
domain: N
Appears in sequences
- Sorted list of orders of Weyl groups of types A_n, B_n, D_n, E_n, F_4, G_2.at n=32A001217
- a(0) = 1; for n > 0, a(n) = 2^(n-1)*n!.at n=10A002866
- Number of reversible strings with n labeled beads of 2 colors.at n=9A032107
- Denominator of (1/Pi)*Integral_{0..oo} (sin x / x)^n dx.at n=10A049331
- E.g.f. x(1+x-2x^2)/(1-2x).at n=10A052594
- E.g.f. x*(1+2x-4x^2)/(1-2x).at n=10A052656
- E.g.f. [1-x -sqrt(1-2x-3x^2)]/(2x) - [1+x-sqrt(1-2x-3x^2)]/2 .at n=10A052731
- Triangle of coefficients of x^2 in the Neumann polynomials.at n=30A057869
- Unrelated-factorial numbers: product of numbers unrelated to n (numbers which have a common divisor with n but do not divide n).at n=21A070251
- Denominators of coefficients of series expansion of a certain integral in the theory of charged particle beams.at n=7A077231
- a(n) = (n+1)*a(n-2) with a(0) = a(1) = 1.at n=19A081405
- Row sums of triangle in A066094.at n=10A121892
- v(n)/A000178(n); v=A203524 and A000178=(superfactorials).at n=4A203526
- Column 1 of the triangular array at A249057.at n=17A249060
- A bisection of A002866.at n=5A274304
- Number of automorphisms in the n-halved cube graph.at n=9A288944
- Number of automorphisms of the n-folded cube graph.at n=8A357827
- Number of Wachs permutations of size n.at n=19A359039
- a(n) = denominator( (e/Pi)*Integral_{x=-oo..+oo} cos(x)/(1 + x^2)^n dx ).at n=10A381845