Numbers n such that n == -1 (mod phi(n-1)).
A119388
Numbers n such that n == -1 (mod phi(n-1)).
Terms
- a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =31a(6) =71a(7) =511a(8) =2591a(9) =131071a(10) =3359231a(11) =167247871a(12) =8589934591
External references
- oeis: A119388