%I #19 May 22 2022 02:14:54
%S 11,601,601,601,107839,577937,8341631,8341631,8341631,8341631,8341631,
%T 166778433637,4054944029077,58520914386689
%N Final prime in first term of A019518 that is divisible by 7^n.
%e None of the numbers 2, 23, 235, and 2357 are divisible by 11, but 235711 is divisible by 7, so a(1)=11.
%e Not until the concatenation through 601 is such a number divisible by 7^2, so a(2)=601.
%Y Cf. A183194 and immediately following entries.
%K nonn,base,more
%O 1,1
%A _James G. Merickel_, Feb 01 2011
%E a(12) added by _James G. Merickel_, Mar 29 2013
%E a(12) corrected and a(13)a(14) added by _Seth A. Troisi_, May 18 2022
