Numbers n such that sigma(sigma(n) - phi(n)) = phi(sigma(n) + phi(n)).

Terms

a(0) =4a(1) =16a(2) =85a(3) =923a(4) =6713a(5) =8035a(6) =8827a(7) =10109a(8) =19349a(9) =21671a(10) =30565a(11) =31499a(12) =41285a(13) =116129a(14) =154255a(15) =269009a(16) =282799a(17) =312997a(18) =362483a(19) =477325a(20) =486301a(21) =498329a(22) =525083a(23) =607057a(24) =609367a(25) =714589a(26) =995087a(27) =1038841a(28) =2013187a(29) =2084785