Numbers n for which phi(n) = phi(n-1) - phi(n+1).

Terms

a(0) =194a(1) =3530a(2) =9338a(3) =27230a(4) =46794a(5) =78182a(6) =90194a(7) =112994a(8) =135014a(9) =437184a(10) =849404a(11) =935220a(12) =1078580a(13) =1283600a(14) =1986974a(15) =2209584a(16) =2341184a(17) =2411174a(18) =2689694a(19) =2744144a(20) =3619070a(21) =3712544a(22) =4738184a(23) =5132984a(24) =6596120a(25) =7829030a(26) =8184714a(27) =12176108a(28) =12292004a(29) =13342958