1009800domain: NAppears in sequencesa(n) = (7*n+1)*(7*n+2)*(7*n+4).at n=14A001547Numbers k such that k | sigma_7(k) - phi(k)^7.at n=34A055701Number of reduced words of length n in Coxeter group on 17 generators S_i with relations (S_i)^2 = (S_i S_j)^3 = I.at n=5A162803