Numbers n such that phi(n) = phi(n-1) - phi(n-2).

Terms

a(0) =6a(1) =8a(2) =26a(3) =78a(4) =218a(5) =306a(6) =3666a(7) =4646a(8) =5066a(9) =8816a(10) =12206a(11) =12546a(12) =19878a(13) =20436a(14) =24236a(15) =29546a(16) =37736a(17) =47996a(18) =60116a(19) =72086a(20) =73026a(21) =77046a(22) =87476a(23) =121146a(24) =126056a(25) =129246a(26) =149756a(27) =190268a(28) =234636a(29) =247856