A275007 Numbers n such that 2^n == sigma(n) (mod n).

1, 12, 286, 5978, 111136, 283584, 339379, 1102652, 8830498, 27952828, 30442612, 84638560, 90619592, 101907952, 175917947

Offset: 1

Author

Altug Alkan, Dec 11 2016

Keywords

• nonn
• more

Comments

Numbers n such that A015910(n) = A054024(n). - Michel Marcus, Dec 11 2016

Examples

			12 is a term because 2^12 == sigma(12) (mod 12).
		

Crossrefs

Cf. A000079, A000203, A015910, A054024.

Programs

PARI

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