A279376 Numbers n such that 2^n == n (mod sigma(n)).

1, 34, 219760, 75963904, 1003204036

Offset

1,2

Links

Table of n, a(n) for n=1..5.

Example

34 is a term because 2^34 == 34 mod 54.

Prog

(PARI) is(n)=Mod(2, sigma(n))^n==n;

Crossrefs

Cf. A000079, A000203.

Sequence in context: A358490 A189649 A280901 * A189311 A189253 A250488

Adjacent sequences: A279373 A279374 A279375 * A279377 A279378 A279379

Keyword

nonn,more

Author

Altug Alkan, Dec 11 2016

Status

approved