%I #11 Apr 21 2021 04:25:02
%S 1,2,3,4,5,6,7,8,10,11,13,15,16,19,20,21,23,26,28,29,30,32,33,34,36,
%T 40,44,46,47,48,50,51,52,55,56,57,59,60,61,64,65,66,68,69,70,72,76,80,
%U 82,83,91,92,96,97,100,101,102,104,112,116,121
%N Numbers whose base-3 run lengths form a palindrome.
%Y Cf. A007089.
%K nonn,base
%O 1,2
%A _Clark Kimberling_
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