%I #7 Oct 10 2019 00:36:28
%S 1,7,9,343,4,8,11,8,8,353,282,77,8,88,22,747,696,232,979,9889,2662,
%T 85458,909,747,414,686,77,363,99,797,878,57775,2992,707,959,818,717,
%U 757,717,198891,909,959,482284,18381,9,3003,494494,63036,888,5775
%N Largest palindromic substring in 7^n.
%Y Cf. A046273.
%K nonn,base
%O 0,2
%A _Patrick De Geest_, Jun 15 1998
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