Numbers k such that phi(k) is a Lucas number.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =8a(7) =10a(8) =12a(9) =19a(10) =27a(11) =38a(12) =54a(13) =2049a(14) =2732a(15) =4098a(16) =5779a(17) =11558a(18) =36717a(19) =48956a(20) =73434