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A128154 a(n) = least k such that the remainder when 14^k is divided by k is n. 34
13, 3, 11, 5, 33, 10, 1967, 9, 23587, 18, 2733, 46, 17651, 15, 93929, 20, 303, 178, 145, 22, 12901, 58, 2721, 25, 17990951, 27, 143, 36, 85, 166, 646123, 82, 2439143677, 55, 63, 76, 319, 123, 295, 52, 51, 77, 247380287953, 45, 5779134947, 90, 87, 74, 175, 146 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

Robert G. Wilson v, Table of n, a(n) for n = 1..10000 with -1 for large entries where a(n) has not yet been found

MATHEMATICA

t = Table[0, {10000} ]; k = 1; While[ k < 3000000000, a = PowerMod[14, k, k]; If[a < 10001 && t[[a]] == 0, t[[a]] = k; Print[{a, k}]]; k++ ]; t

lk[n_]:=Module[{k=1}, While[PowerMod[14, k, k]!=n, k++]; k]; Array[lk, 20] (* Harvey P. Dale, Aug 17 2013 *)

CROSSREFS

Cf. A036236, A078457, A119678, A119679, A127816, A119715, A119714, A127817, A127818, A127819, A127820, A127821, A128155, A128156, A128157, A128158, A128159, A128160, A128149, A128150.

Sequence in context: A117540 A010221 A113172 * A213538 A264971 A107806

Adjacent sequences: A128151 A128152 A128153 * A128155 A128156 A128157

KEYWORD

hard,nonn

AUTHOR

Alexander Adamchuk, Feb 16 2007

EXTENSIONS

More terms from Ryan Propper, Feb 28 2007

a(43) from Hagen von Eitzen, Aug 16 2009

STATUS

approved

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Last modified December 7 04:29 EST 2022. Contains 358649 sequences. (Running on oeis4.)