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A055693 10^n (mod n-1) = -1. 0
2, 102, 41310, 102690, 309162, 315150, 1000002, 2488530, 4564350, 10637055, 28855610, 35049930, 38982870, 42176490, 43232070, 53288510, 64253070 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

MATHEMATICA

Do[If[PowerMod[10, n, n-1]==n-2, Print[n]], {n, 2, 10^8}]

CROSSREFS

Sequence in context: A111012 A157066 A202740 * A106299 A176933 A101530

Adjacent sequences:  A055690 A055691 A055692 * A055694 A055695 A055696

KEYWORD

nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 09 2000

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Last modified February 15 11:25 EST 2012. Contains 205777 sequences.