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%I #14 Dec 15 2024 14:33:58
%S 11,109,1087,10867,108649,1086469,10864669,108646667,1086466657,
%T 10864666531,108646665307,1086466653067,10864666530661,
%U 108646665306581,1086466653065803,10864666530658001,108646665306579997,1086466653065799961,10864666530657999467,108646665306579994669
%N Largest prime < 10*a(n-1), a(1)=11.
%H Vincenzo Librandi, <a href="/A124290/b124290.txt">Table of n, a(n) for n = 1..200</a>
%t NestList[NextPrime[10#,-1]&,11,20] (* _Harvey P. Dale_, Mar 09 2011 *)
%Y Cf. A124262.
%K nonn
%O 1,1
%A _Artur Jasinski_, Dec 16 2006