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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.)