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A172154
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Numbers k such that 24*k+-5 are both prime.
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1
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1, 2, 6, 7, 12, 13, 16, 21, 23, 27, 29, 33, 34, 44, 49, 54, 62, 68, 71, 72, 78, 83, 89, 92, 98, 99, 103, 106, 112, 114, 119, 148, 149, 154, 163, 167, 176, 177, 181, 182, 187, 188, 197, 209, 216, 218, 222, 232, 236, 237, 244, 252, 254, 257, 259, 266, 274, 279, 288, 301
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OFFSET
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1,2
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LINKS
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EXAMPLE
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1 is a term because 24*1-5 = 19 (prime) and 24*1+5 = 29 (prime).
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MAPLE
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q:= n-> (t-> andmap(isprime, [t-5, t+5]))(24*n):
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MATHEMATICA
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okQ[n_]:=Module[{n24=24 n}, PrimeQ[n24-5]&&PrimeQ[n24+5]]; Select[Range[500], okQ] (* Harvey P. Dale, Feb 16 2010 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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Sequence corrected (by deleting improper terms and adding additional terms) by Harvey P. Dale, Feb 16 2010
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STATUS
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approved
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