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A158021 Primes such that p, 10*p-1 and (p-1)/2 are all prime. 0
11, 23, 83, 107, 167, 179, 227, 347, 479, 587, 839, 863, 983, 1283, 1367, 1439, 1487, 1619, 1823, 1907, 2027, 2039, 2447, 2879, 2963, 2999, 3119, 3203, 3623, 3863, 4127, 4139, 4259, 4283, 4787, 5099, 5483, 5879, 6719, 6779, 6983, 7247, 7703, 7727, 7823 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

MATHEMATICA

Flatten[Table[If[PrimeQ[n] && PrimeQ[10*n - 1] && PrimeQ[( n - 1)/2], n, {}], {n, 1, 10000}]]

CROSSREFS

A059455

Sequence in context: A184394 A060160 A241973 * A239638 A050767 A145918

Adjacent sequences:  A158018 A158019 A158020 * A158022 A158023 A158024

KEYWORD

nonn

AUTHOR

Roger L. Bagula and Gary W. Adamson, Mar 11 2009

STATUS

approved

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Last modified August 7 17:44 EDT 2020. Contains 336278 sequences. (Running on oeis4.)