6291552domain: NAppears in sequencesSolutions to phi(gpf(x)) - gpf(phi(x)) = 65534 = c are special multiples of 65537, x=65537*k, where the largest prime factors of factor k were observed in {2, 3, 5, 17, 257}.at n=25A070816a(n) = 3*n*(64*n^2 + 1).at n=31A295130