A067940 Let rep(n) be the n-th repunit number, sequence gives values of n such that rep(n)==rep(7) (mod n).

1, 2, 4, 5, 7, 8, 10, 11, 13, 16, 20, 25, 32, 37, 40, 49, 50, 55, 64, 80, 82, 91, 100, 125, 128, 133, 148, 160, 175, 200, 217, 250, 259, 275, 301, 320, 325, 370, 385, 400, 427, 469, 475, 481, 500, 511, 542, 553, 592, 625, 637, 640, 679, 715, 721, 763, 800, 889

Offset

1,2

Links

Table of n, a(n) for n=1..58.

Crossrefs

Cf. A002275.

Sequence in context: A226896 A175302 A288521 * A230286 A336236 A215099

Adjacent sequences: A067937 A067938 A067939 * A067941 A067942 A067943

Keyword

easy,nonn

Author

Benoit Cloitre, Mar 05 2002

Status

approved