A015903 Numbers n such that n | 11^n + 11.

1, 2, 4, 6, 11, 12, 22, 44, 66, 132, 148, 276, 671, 814, 1068, 2388, 3498, 24564, 29234, 54924, 60126, 80476, 80526, 85866, 212532, 234652, 252967, 307396, 368668, 700404, 885786, 1121044, 1350812, 1366476, 1631004, 1697116, 1698906, 1718431, 1803166, 2637811, 3186678, 3704196, 4888236, 8990356

Offset: 1

Author

Robert G. Wilson v

Keywords

• nonn

Links

• Robert Israel, Table of n, a(n) for n = 1..200

Programs

Maple

filter:= n -> 11 &^ n + 11 mod n = 0:
select(filter, [$1..2*10^6]); # Robert Israel, Sep 13 2018

PARI

isok(n) = Mod(11, n)^n + Mod(11, n) == 0; \\ Michel Marcus, Sep 13 2018

Extensions

Corrected and extended by Robert Israel, Sep 13 2018