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 A087683 Numbers n such that n + 10 and n - 10 are both prime. 12
 13, 21, 27, 33, 51, 57, 63, 69, 93, 99, 117, 141, 147, 183, 189, 201, 261, 267, 273, 303, 321, 327, 357, 363, 369, 399, 411, 429, 453, 477, 489, 513, 531, 567, 597, 603, 609, 651, 663, 729, 819, 849, 867, 873, 897, 957, 981, 987 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 3 divides every term except the first. - T. D. Noe, May 14 2008 LINKS T. D. Noe, Table of n, a(n) for n=1..1000 MATHEMATICA f[n_]:=PrimeQ[n-10]&&PrimeQ[n+10]; lst={}; Do[If[f[n], AppendTo[lst, n]], {n, 9, 8!, 2}]; lst (* Vladimir Joseph Stephan Orlovsky, Oct 09 2009 *) CROSSREFS Cf. A014574, A087678-A087682, A087695-A087697, A088770. Sequence in context: A332512 A304006 A304948 * A195375 A128819 A165955 Adjacent sequences:  A087680 A087681 A087682 * A087684 A087685 A087686 KEYWORD easy,nonn AUTHOR Zak Seidov, Sep 27 2003 STATUS approved

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Last modified September 25 23:23 EDT 2020. Contains 337346 sequences. (Running on oeis4.)