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A067936
Let rep(n) be the n-th repunit number, sequence gives values of n such that : rep(n) == rep(3) (mod n).
0
1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 21, 24, 25, 30, 33, 39, 40, 50, 51, 55, 57, 60, 69, 75, 87, 93, 100, 105, 111, 120, 123, 125, 129, 141, 150, 159, 165, 177, 183, 195, 200, 201, 213, 219, 222, 231, 237, 249, 250, 267, 273, 275, 291, 300, 303, 309, 321, 327
OFFSET
1,2
CROSSREFS
Cf. A002275.
Sequence in context: A070994 A291686 A057197 * A087721 A226244 A140642
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Mar 05 2002
STATUS
approved