%I #15 Aug 10 2021 04:58:40
%S 1,13,169,2197,14209,28561,184717,371293,2401321,4826809,15530437,
%T 31217173,62748517,130238329,178895977,201895681,405823249,815730721,
%U 1693098277,2325647701,2422762381,2624643853,4286414821,5275702237
%N Numbers k that divide 9^k + 4^k.
%Y Cf. A074608.
%K nonn
%O 1,2
%A _David W. Wilson_
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