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A020210 Pseudoprimes to base 82. 1
9, 25, 27, 45, 81, 91, 225, 249, 325, 405, 481, 511, 561, 645, 747, 793, 891, 925, 949, 1105, 1245, 1247, 1345, 1377, 1387, 1431, 1525, 1541, 1729, 1825, 2025, 2071, 2101, 2241, 2257, 2421, 2465, 2701, 2821, 2871, 2905, 3825, 4033, 4239, 4453, 5185, 5611 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 82^(n-1) == 1 (mod n). - Michel Lagneau, Feb 18 2012

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

Index entries for sequences related to pseudoprimes

MATHEMATICA

base = 82; t = {}; n = 1; While[Length[t] < 100, n++; If[! PrimeQ[n] && PowerMod[base, n-1, n] == 1, AppendTo[t, n]]]; t (* T. D. Noe, Feb 21 2012 *)

CROSSREFS

Cf. A001567 (pseudoprimes to base 2).

Sequence in context: A268576 A053850 A225498 * A275196 A325373 A062739

Adjacent sequences:  A020207 A020208 A020209 * A020211 A020212 A020213

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 26 00:32 EDT 2020. Contains 334613 sequences. (Running on oeis4.)