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A129496 Composite numbers k such that 6^k (mod k) is a power of 6 greater than 1. 6
10, 15, 21, 30, 35, 38, 42, 45, 46, 58, 60, 62, 70, 74, 82, 84, 86, 90, 94, 105, 106, 118, 122, 126, 132, 134, 140, 142, 146, 158, 166, 178, 180, 182, 185, 190, 194, 202, 206, 210, 214, 215, 217, 218, 219, 222, 226, 228, 231, 237, 249, 252, 254, 258, 259, 262 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

EXAMPLE

38 is a member of the sequence since 6^38 (mod 38) == 36.

MATHEMATICA

Select[Range@ 266, (p = PowerMod[6, #, #]) > 1 && IntegerQ@ Log[6, p] && CompositeQ[#] &] (* corrected by Amiram Eldar, Jul 24 2021 *)

CROSSREFS

Cf. A036236, A129492, A129493, A129494, A129495, A129497.

Sequence in context: A322045 A062691 A257630 * A075520 A030663 A013638

Adjacent sequences:  A129493 A129494 A129495 * A129497 A129498 A129499

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Apr 17 2007

STATUS

approved

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Last modified October 15 15:45 EDT 2021. Contains 348033 sequences. (Running on oeis4.)