A020212 Pseudoprimes to base 84.

85, 415, 481, 703, 1105, 1111, 1411, 1615, 2465, 2501, 2509, 2981, 3145, 3655, 3667, 4141, 5713, 6161, 6533, 6973, 7055, 7141, 7201, 7885, 8401, 8695, 9061, 10585, 11441, 13019, 13579, 13981, 14023, 14383, 14491, 15181, 15251, 15355, 15521, 16405, 16745

Offset

1,1

Comments

Composite numbers n such that 84^(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 = 84; 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: A068559 A045017 A297399 * A251343 A251336 A262425

Adjacent sequences: A020209 A020210 A020211 * A020213 A020214 A020215

Keyword

nonn

Author

David W. Wilson

Status

approved