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%I #4 Sep 05 2013 13:48:50
%S 17,167,1669,16673,166723,1667227,16672267,166722667,1667226667,
%T 16672266659,166722666527,1667226665213,16672266652081,
%U 166722666520801,1667226665207989,16672266652079879,166722666520798747
%N Largest prime < 10*a[n-1], a[1]=17.
%H Harvey P. Dale, <a href="/A124299/b124299.txt">Table of n, a(n) for n = 1..300</a>
%t NestList[NextPrime[10#,-1]&,17,20] (* _Harvey P. Dale_, Sep 05 2013 *)
%Y Cf. A006902, A040016, A120031-A120041.
%K nonn
%O 1,1
%A _Artur Jasinski_, Dec 16 2006
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