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A075277 Interprimes which are of the form s*prime, s=2. 21
4, 6, 26, 34, 86, 134, 254, 274, 334, 386, 446, 566, 974, 1126, 1226, 1234, 1286, 1294, 1546, 2066, 2374, 2386, 2554, 2854, 2906, 2966, 3086, 3326, 3694, 3898, 4054, 4286, 4594, 4742, 4846, 4874, 4954, 5006, 5218, 5366, 5686, 5714, 5854, 6238, 6274, 6326 (list; graph; refs; listen; history; 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.

EXAMPLE

7646 is an interprime and 7646/2 = 3823 is prime.

MATHEMATICA

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

CROSSREFS

Cf. A075277--A075296.

Sequence in context: A176858 A028273 A024471 * A192874 A159557 A176756

Adjacent sequences:  A075274 A075275 A075276 * A075278 A075279 A075280

KEYWORD

easy,nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Sep 12 2002

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Last modified February 13 02:13 EST 2012. Contains 205435 sequences.