37911domain: NAppears in sequencesOdd terms of A059756.at n=22A111042Numbers n such that phi(phi(n)) + sigma(sigma(n)) is a 4th power.at n=25A172464Growth series for group with presentation < S, T : S^2 = T^3 = (S*T)^12 = 1 >.at n=29A299253