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%I #9 Aug 09 2021 01:32:51
%S 1,17,289,4063,4913,69071,83521,971057,1174207,1419857,1545589,
%T 16507969,19961519,24137569,26275013,232082623,271342117,280635473,
%U 339345823,369395771,410338673,415616459,446675221,3945404591
%N Numbers k that divide 10^k + 7^k.
%K nonn
%O 1,2
%A _David W. Wilson_
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