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%I #11 Dec 16 2023 10:59:08
%S 1,1,3,7,7,22,3,6,6,3,19,18,4,39,6,13,37,15,15,6,16,9,96,61,19,6,9,3,
%T 33,63,57,117,55,49,30,3,28,6,42,24,36,72,21,60,6,24,33,61,21,85,31,
%U 49,13,93,18,90,9,16,135,19,55,9,135,60,6,30,3,16,115,114,19,99,15,147,171,42
%N Smallest integer k>0 such that k*10^n + 1 is a prime.
%H Robert Price, <a href="/A121172/b121172.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) = (A070854(n)-1)/10^n. - _Ray Chandler_, Feb 10 2009
%e a(1) = 1 because A030430[1] = 11 is a smallest prime of form 10*k + 1.
%e a(2) = 1 because A062800[1] = 101 is a smallest prime of form 100*k + 1.
%Y Cf. A030430, A062800, see A070854 for resulting primes.
%K nonn
%O 1,3
%A _Alexander Adamchuk_, Aug 14 2006
%E Minor edits by _Ray Chandler_, Feb 10 2009
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