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A075285
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Interprimes which are of the form s*prime, s=10.
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1
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30, 50, 170, 370, 590, 610, 730, 1370, 1390, 1910, 1990, 2290, 3310, 3730, 4010, 4990, 5410, 6070, 6590, 7190, 7870, 8770, 9470, 9970, 10610, 11090, 11810, 11930, 12970, 14470, 15230, 15310, 16270, 16570, 16990, 17330, 18790, 19130, 20110
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OFFSET
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1,1
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COMMENTS
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Interprimes of the form s*prime are in A075277-A075296 ( s = 2 - 21 ). Case s=1 is impossible.
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LINKS
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EXAMPLE
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370 is an interprime and 370/10 = 37 is prime.
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MATHEMATICA
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s=10; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 4000}], PrimeQ[ #/s]&]
Select[Mean/@Partition[Prime[Range[2500]], 2, 1], PrimeQ[#/10]&] (* Harvey P. Dale, Jun 24 2017 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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