434772domain: NAppears in sequencesNumber of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w<R, x<R, y>R, z>R, where R = max{w,x,y,z} - min{w,x,y,z}.at n=25A212753Numbers m such that the GCD of the x's that satisfy sigma(x) = m is 5.at n=18A241650