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%I #5 Mar 09 2015 00:19:07
%S 2,7,31,151,751,3739,18691,93427,467123,2335607,11678021,58390103,
%T 291950479,1459752391,7298761949,36493809683,182469048409,
%U 912345242041,4561726210189,22808631050929,114043155254641,570215776273147
%N a(n) is largest prime < 5*a(n-1).
%H Artur Jasinski, <a href="/A126033/b126033.txt">Table of n, a(n) for n = 1..40</a>
%Y Cf. A006902, A040016, A120031-A120040.
%K nonn
%O 1,1
%A _Artur Jasinski_, Dec 16 2006
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