A067942 Let rep(n) be the n-th repunit number; sequence gives values of n such that rep(n) == rep(9) (mod n).

1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 21, 24, 25, 30, 32, 33, 36, 39, 40, 45, 48, 50, 55, 60, 63, 64, 72, 73, 75, 80, 90, 96, 99, 100, 101, 105, 111, 117, 120, 125, 128, 137, 144, 150, 153, 160, 164, 165, 171, 180, 192, 195, 200, 207, 222, 225, 231, 240

Offset

1,2

Links

Table of n, a(n) for n=1..63.

Crossrefs

Cf. A002275.

Sequence in context: A230780 A302540 A332487 * A130176 A156541 A325663

Adjacent sequences: A067939 A067940 A067941 * A067943 A067944 A067945

Keyword

easy,nonn

Author

Benoit Cloitre, Mar 05 2002

Status

approved