287992domain: NAppears in sequencesNumber of reduced words of length n in the Weyl group E_8 on 8 generators and order 696729600.at n=19A162494G.f.: exp( Sum_{n>=1} (2*sigma(n^2) - sigma(n)^2) * x^n/n ).at n=25A195734Number of (w,x,y,z) with all terms in {1,...,n} and 2|w-x|<n+|y-z|.at n=24A212687