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A067940 Let rep(n) be the n-th repunit number, sequence gives values of n such that rep(n)==rep(7) (mod n). 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 26 11:45 EST 2022. Contains 350598 sequences. (Running on oeis4.)