A277626 Odd numbers n such that 2^n == phi(n) (mod n).

1, 3, 15, 255, 65535, 4139059, 15734689, 66322477, 83623935, 4294967295

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Prog

(PARI) is(n)=Mod(2, n)^n==eulerphi(n)&&n%2==1;

Crossrefs

Cf. A000010, A000079, A015910.

Sequence in context: A139289 A116518 A247174 * A050474 A250405 A051179

Adjacent sequences: A277623 A277624 A277625 * A277627 A277628 A277629

Keyword

nonn,more

Author

Altug Alkan, Dec 11 2016

Status

approved