The numbers k for which gcd(k, phi(k)) + gcd(k, tau(k)) = gcd(k, sigma(k)).

Terms

a(0) =3040a(1) =9440a(2) =22240a(3) =27360a(4) =28640a(5) =30080a(6) =50560a(7) =54288a(8) =60640a(9) =67040a(10) =76752a(11) =79840a(12) =99040a(13) =105440a(14) =109888a(15) =118240a(16) =137440a(17) =152960a(18) =163040a(19) =189072a(20) =200160a(21) =201440a(22) =211536a(23) =233440a(24) =234880a(25) =239840a(26) =249216a(27) =252640a(28) =256128a(29) =256464