5160960

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=25A001217
• Order of real Clifford group L_n connected with Barnes-Wall lattices in dimension 2^n.at n=3A001309
• a(0) = 1; for n > 0, a(n) = 2^(n-1)*n!.at n=8A002866
• a(n) = (2^(n-1))!*2^(2^(n-1)-1).at n=3A028370
• Number of reversible strings with n labeled beads of 2 colors.at n=7A032107
• E.g.f. x(1+x-2x^2)/(1-2x).at n=8A052594
• E.g.f. x*(1+2x-4x^2)/(1-2x).at n=8A052656
• Expansion of e.g.f. x^2/(1-4*x).at n=7A052670
• Triangle of coefficients of x^2 in the Neumann polynomials.at n=20A057869
• Triangle T(n,k) of number of minimal 3-covers of a labeled n-set that cover k points of that set uniquely (k=3,..,n).at n=29A057964
• Denominators in the series for Bessel function J5(x).at n=2A061404
• Matrix square of unsigned Lah triangle abs(A008297(n,k)) or A105278(n,k).at n=28A079621
• a(n) = (n+1)*a(n-2) with a(0) = a(1) = 1.at n=15A081405
• Triangle of certain double factorials.at n=52A092081
• Sum of the non-unitary divisors of A064115(n) (or of 1+A064115(n)).at n=23A103846
• Row sums of triangle in A066094.at n=8A121892
• Denominators of numbers with g.f. exp(1-(1-x)^(1/2)).at n=8A143968
• Array read by antidiagonals: T(n,k) = (k+1)^n*(n+k)!.at n=37A154120
• Triangle read by rows: T(n,k) = n!*2^k/(n-k)! (n >= 0, 0 <= k <= n).at n=43A161381
• Triangle of coefficients of a sequence of polynomials related to the enumeration of linear labeled rooted trees.at n=36A194649