646908domain: NAppears in sequencesCoefficients arising in the enumeration of configurations of linear chains.at n=16A038746Number of reduced words of length n in Coxeter group on 3 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.at n=23A162920Number of permutations of [n] avoiding {1243, 1324, 2431}.at n=12A294822