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A020191 Pseudoprimes to base 63. 1
62, 341, 481, 529, 703, 841, 1105, 1147, 1417, 1985, 2071, 2465, 2509, 3379, 3565, 3683, 4033, 4577, 5161, 5461, 5662, 6119, 6533, 6943, 7141, 7711, 9073, 9265, 10585, 13333, 13747, 14089, 14689, 14981, 15458, 18721, 19345, 19685, 19951, 21037, 21361 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 63^(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 = 63; 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: A223072 A010746 A124995 * A212834 A202959 A209913

Adjacent sequences:  A020188 A020189 A020190 * A020192 A020193 A020194

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 24 11:23 EDT 2019. Contains 323529 sequences. (Running on oeis4.)