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A075284
Interprimes which are of the form s*prime, s=9.
1
18, 45, 99, 279, 747, 909, 1611, 1737, 2007, 2259, 2439, 2799, 3879, 5193, 5571, 5787, 6147, 6219, 6471, 6813, 6849, 7677, 8271, 8577, 8703, 8739, 8793, 9279, 9549, 9621, 10107, 10161, 10629, 10953, 11241, 11511, 11619, 11709, 13329, 14031
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
EXAMPLE
279 is an interprime and 279/9 = 31 is prime.
MATHEMATICA
s=9; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 1000}], PrimeQ[ #/s]&]
Select[Mean/@Partition[Prime[Range[2000]], 2, 1], PrimeQ[#/9]&] (* Harvey P. Dale, Apr 27 2024 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Sep 12 2002
STATUS
approved