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%I #9 Sep 20 2016 14:47:04
%S 29,613,2027,2633,3037,3643,4451,6067,6269,6673,7481,8087,8693,
%T 10041011,10341041,10461053,10861093,10941101,11041111,11361143,
%U 11421149,11941201,12001207,12061213,12141221,12241231,12501257
%N Primes that are concatenations of n with n + 7.
%H Harvey P. Dale, <a href="/A032630/b032630.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Table[FromDigits[Join[IntegerDigits[n],IntegerDigits[n+7]]],{n,1500}],PrimeQ] (* _Harvey P. Dale_, Sep 20 2016 *)
%Y Cf. A032612, A032622.
%K nonn,base
%O 1,1
%A _Patrick De Geest_, May 15 1998
%E Edited by _Charles R Greathouse IV_, Apr 28 2010
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