Numbers k such that phi(k) = phi(sigma(k)-k).

Terms

a(0) =2a(1) =4a(2) =6a(3) =10a(4) =16a(5) =28a(6) =78a(7) =114a(8) =152a(9) =165a(10) =186a(11) =222a(12) =224a(13) =238a(14) =256a(15) =402a(16) =496a(17) =654a(18) =704a(19) =738a(20) =762a(21) =834a(22) =942a(23) =1086a(24) =1194a(25) =1266a(26) =1456a(27) =1485a(28) =1665a(29) =1722