1924111domain: NAppears in sequencesSum of numbers that can be written as t*n + u*(n+1) for nonnegative integers t,u in exactly one way.at n=36A076454Number of reduced words of length n in Coxeter group on 38 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.at n=4A163221