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A178588 Primes that are the average of the members of exactly 2 emirp pairs. 2
14741, 22727, 23327, 28277, 63541, 65761, 85453, 1217171, 1221221, 1227271, 1243421, 1245421, 1253521, 1261571, 1271671, 1283771, 1327231, 1338331, 1347481, 1359581, 1363631, 1371731, 1415191, 1489841, 1513151, 1514101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

23327 is the prime arithmetic mean of emirp pair (10853, 35801) as well as of emirp pair (15803, 30851), and no other.

CROSSREFS

Cf. A178581, A178587, A178589.

Sequence in context: A249464 A209513 A178587 * A089315 A202314 A236667

Adjacent sequences:  A178585 A178586 A178587 * A178589 A178590 A178591

KEYWORD

nonn,base

AUTHOR

Lekraj Beedassy, May 29 2010

EXTENSIONS

Extended by Ray Chandler, Jul 05 2010

a(8)-a(26) from Donovan Johnson, Jul 06 2010

STATUS

approved

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Last modified May 28 16:37 EDT 2022. Contains 354119 sequences. (Running on oeis4.)