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A200879 Numbers n such that 10^n - 1 divides 10^(10^100) - 10. 2
1, 3, 9, 11, 33, 41, 99, 101, 123, 251, 271, 303, 369, 451, 753, 813, 909, 1111, 1353, 2259, 2439, 2761, 2981, 3333, 3541, 4059, 4141, 5051, 8283, 8943, 9091, 9999, 10291, 10623, 11111, 12423, 15153, 21401, 24849, 25351, 25601, 26829, 27273, 27371, 27961 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..45.

Dario A. Alpern, Known prime factors of Googolplex - 10

Eric Weisstein's World of Mathematics, Googolplex

MATHEMATICA

Prepend[Select[Range[3, 3000, 2], PowerMod[10, 10^100, 10^# - 1] == 10 &], 1]

CROSSREFS

A200861 is a subsequence.

Sequence in context: A268033 A145812 A220944 * A027895 A027890 A175203

Adjacent sequences:  A200876 A200877 A200878 * A200880 A200881 A200882

KEYWORD

fini,nonn

AUTHOR

Arkadiusz Wesolowski, Nov 23 2011

STATUS

approved

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Last modified October 18 03:12 EDT 2018. Contains 316302 sequences. (Running on oeis4.)