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A255921 Bases b for which no Wieferich primes p with p < b exist such that p is a base-b Wieferich prime. 10
2, 3, 4, 6, 11, 12, 14, 15, 16, 20, 34, 36, 39, 47, 52, 56, 58, 59, 66, 72, 83, 84, 86, 87, 88, 90, 92, 95, 96, 102, 103, 104, 106, 108, 111, 114, 119, 123, 135, 139, 140, 142, 144, 156, 159, 160, 162, 167, 171, 175, 180, 183, 186, 187, 194, 198, 200, 203, 204 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers b such that A255920(n) = 0.

LINKS

Table of n, a(n) for n=1..59.

PROG

(PARI) for(b=2, 1e4, i=0; forprime(p=1, b, if(Mod(b, p^2)^(p-1)==1, i++)); if(i==0, print1(b, ", ")))

CROSSREFS

Cf. A255920, A255922, A255923, A255924, A255925.

Sequence in context: A134696 A151677 A304872 * A111338 A029457 A014859

Adjacent sequences:  A255918 A255919 A255920 * A255922 A255923 A255924

KEYWORD

nonn

AUTHOR

Felix Fröhlich, Mar 11 2015

STATUS

approved

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Last modified September 18 09:22 EDT 2020. Contains 337166 sequences. (Running on oeis4.)