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%I #11 Oct 23 2018 05:44:57
%S 1,2,3,4,6,12,15,26,28,52,76,78,87,156,364,435,532,988,2356,3052,5356,
%T 6916,7588,10095,11476,13636,15051,15964,16458,24388,31996,36114,
%U 40132,42484,46396,50428,50726,72436,114846,132652,148276,171076,208468
%N Numbers k such that k | 12^k + 12.
%H Giovanni Resta, <a href="/A015904/b015904.txt">Table of n, a(n) for n = 1..700</a>
%t Select[Range[10^5], Mod[PowerMod[12, #, #] + 12, #] == 0 &] (* _Giovanni Resta_, Oct 23 2018 *)
%Y Cf. A006517, A015888, A015889, A015891, A015892, A015893, A015897, A015898, A015902, A015903, A015905, A015906.
%K nonn
%O 1,2
%A _Robert G. Wilson v_
%E Missing a(2)-a(5) from _Giovanni Resta_, Oct 23 2018
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