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A020199 Pseudoprimes to base 71. 1
9, 10, 14, 15, 21, 35, 45, 63, 70, 105, 231, 315, 370, 435, 561, 703, 1035, 1105, 1387, 1729, 1921, 2071, 2209, 2321, 2465, 2701, 2821, 2871, 3290, 4005, 4033, 4431, 5565, 6541, 6601, 7345, 7957, 8295, 8365, 8695, 8911, 9637, 9730, 9809, 10349, 10585 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 71^(n-1) == 1 (mod n).

LINKS

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

Index entries for sequences related to pseudoprimes

MATHEMATICA

base = 71; 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: A061445 A261614 A088710 * A227943 A114844 A194593

Adjacent sequences:  A020196 A020197 A020198 * A020200 A020201 A020202

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 3 19:54 EDT 2021. Contains 346441 sequences. (Running on oeis4.)