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 A030432 Primes of form 10n+7. 16

%I

%S 7,17,37,47,67,97,107,127,137,157,167,197,227,257,277,307,317,337,347,

%T 367,397,457,467,487,547,557,577,587,607,617,647,677,727,757,787,797,

%U 827,857,877,887,907,937,947,967,977,997,1087,1097,1117,1187,1217,1237

%N Primes of form 10n+7.

%H Michael B. Porter, <a href="/A030432/b030432.txt">Table of n, a(n) for n=0..100000</a>

%H A. Granville and G. Martin, <a href="http://www.arXiv.org/abs/math.NT/0408319">Prime number races</a>

%F a(n) = 10*A102342(n) + 7.

%F Union of A132231 and A039949. [From _Ray Chandler_, Apr 07 2009]

%t Select[Prime@Range[210], Mod[ #, 10] == 7 &] (*Chandler*)

%o (MAGMA) [n: n in [7..1240 by 10] | IsPrime(n)]; // Bruno Berselli, Apr 06 2011

%Y Cf. A045357, A045380, A049509, A102342.

%K nonn

%O 1,1

%A _Warut Roonguthai_

%E Extended by _Ray Chandler_, Nov 07 2006

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