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A020161 Pseudoprimes to base 33. 1
4, 8, 16, 32, 85, 496, 545, 703, 1057, 1105, 1417, 1649, 1729, 1853, 2465, 2501, 2821, 3368, 4033, 4492, 4681, 5461, 5713, 5833, 6533, 6601, 7861, 8911, 9061, 9073, 9265, 10585, 11305, 11359, 12209, 12403, 13741, 15841, 16589, 16745, 17968, 18103, 19909 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 33^(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 = 33; 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 *)

Select[Range[20000], CompositeQ[#]&&PowerMod[33, #-1, #]==1&] (* Harvey P. Dale, Oct 05 2015 *)

CROSSREFS

Cf. A001567 (pseudoprimes to base 2).

Sequence in context: A089890 A049932 A272712 * A068890 A073856 A019458

Adjacent sequences:  A020158 A020159 A020160 * A020162 A020163 A020164

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified January 25 01:33 EST 2020. Contains 331229 sequences. (Running on oeis4.)