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A087683 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; 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 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Oct 09 2009]

CROSSREFS

Cf. A014574, A087678-A087683, A087695-A087697, A088770.

Sequence in context: A032693 A034294 A049745 * A195375 A128819 A165955

Adjacent sequences:  A087680 A087681 A087682 * A087684 A087685 A087686

KEYWORD

easy,nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Sep 27 2003

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.