Numbers n such that gcd(n, phi(n)) = gcd(phi(n), sigma(n)) = gcd(sigma(n), n) = tau(n).

Terms

a(0) =1a(1) =184a(2) =376a(3) =1336a(4) =1912a(5) =2104a(6) =2872a(7) =3064a(8) =3832a(9) =4024a(10) =4792a(11) =5176a(12) =5752a(13) =5944a(14) =6712a(15) =6904a(16) =7096a(17) =7864a(18) =8824a(19) =9784a(20) =10552a(21) =10936a(22) =11512a(23) =11896a(24) =12472a(25) =12664a(26) =12856a(27) =14584a(28) =14776a(29) =16312