Numbers n such that phi(n) + 4 divides sigma(n).

Terms

a(0) =6a(1) =15a(2) =21a(3) =24a(4) =30a(5) =33a(6) =39a(7) =42a(8) =51a(9) =57a(10) =66a(11) =69a(12) =78a(13) =84a(14) =87a(15) =93a(16) =96a(17) =102a(18) =108a(19) =111a(20) =114a(21) =120a(22) =123a(23) =129a(24) =138a(25) =141a(26) =159a(27) =174a(28) =175a(29) =177