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A020192 Pseudoprimes to base 64. 1
9, 15, 21, 35, 39, 45, 63, 65, 85, 91, 105, 117, 133, 153, 195, 221, 231, 247, 259, 273, 315, 341, 357, 435, 451, 455, 481, 511, 561, 585, 645, 651, 671, 703, 763, 765, 819, 861, 873, 949, 1001, 1035, 1105, 1205, 1247, 1271, 1281, 1365, 1387, 1417, 1541, 1581 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 64^(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 = 64; 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: A096788 A050991 A033553 * A241809 A063174 A072569

Adjacent sequences:  A020189 A020190 A020191 * A020193 A020194 A020195

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified April 26 08:53 EDT 2019. Contains 322472 sequences. (Running on oeis4.)