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A109994 Chen primes p such that their p + 2 counterpart is a Sarrus number (pseudoprime to base 2). 1
2699, 4679, 10259, 14489, 18719, 19949, 31607, 42797, 49139, 85487, 90749, 104651, 129887, 226799, 294269, 396269, 422657, 458987, 481571, 665279, 710531, 729059, 1082399, 1251947, 1302449, 1994687, 2035151, 2510567, 2811269, 3090089 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture: sequence is infinite.

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Range[10^5], PrimeQ[#] && PowerMod[2, (# + 1), # + 2] == 1 && PrimeNu[# + 2] == 2 &] (* Amiram Eldar, Jun 28 2019 *)

CROSSREFS

Cf. A109611, A001567.

Sequence in context: A254547 A254477 A115930 * A322525 A254805 A254798

Adjacent sequences:  A109991 A109992 A109993 * A109995 A109996 A109997

KEYWORD

nonn

AUTHOR

Jason Earls, Sep 01 2005

STATUS

approved

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Last modified August 4 21:32 EDT 2021. Contains 346455 sequences. (Running on oeis4.)