Numbers n such that sigma(n) is congruent to n mod phi(n).

Terms

a(0) =1a(1) =2a(2) =6a(3) =10a(4) =12a(5) =44a(6) =90a(7) =184a(8) =440a(9) =528a(10) =588a(11) =672a(12) =752a(13) =3796a(14) =8928a(15) =9888a(16) =12224a(17) =35640a(18) =37680a(19) =49024a(20) =50976a(21) =89152a(22) =94200a(23) =108192a(24) =146412a(25) =159840a(26) =279864a(27) =1734720a(28) =2554368a(29) =2977920