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A075279 Interprimes which are of the form s*prime, s=4. 1
12, 76, 236, 356, 436, 596, 604, 1268, 1324, 1436, 1556, 1604, 1756, 2284, 2396, 3316, 3764, 3812, 4076, 4612, 4996, 5116, 5276, 5492, 5524, 5804, 6628, 6676, 6932, 6964, 7468, 7484, 7892, 8524, 8644, 8716, 9004, 9836, 11276, 12476, 14156, 14636 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Interprimes which are of the form s*prime are in A075277-A075296 (s = 2-21). Case s = 1 is impossible.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

236 is an interprime and 236/4 = 59 is prime.

MATHEMATICA

s=4; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 1000}], PrimeQ[ #/s]&]

Select[Mean/@Partition[Prime[Range[2000]], 2, 1], PrimeQ[#/4]&] (* Harvey P. Dale, Jul 31 2018 *)

CROSSREFS

Cf. A075277-A075296.

Sequence in context: A051104 A044199 A044580 * A009405 A009839 A190066

Adjacent sequences:  A075276 A075277 A075278 * A075280 A075281 A075282

KEYWORD

easy,nonn

AUTHOR

Zak Seidov, Sep 12 2002

STATUS

approved

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Last modified November 27 04:21 EST 2020. Contains 338677 sequences. (Running on oeis4.)