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Numbers whose base-11 representation has the same number of 1's and 2's.

0

`%I #11 Jun 26 2021 06:48:45
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`%S 0,3,4,5,6,7,8,9,10,13,23,33,36,37,38,39,40,41,42,43,44,47,48,49,50,
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`%T 51,52,53,54,55,58,59,60,61,62,63,64,65,66,69,70,71,72,73,74,75,76,77,
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`%U 80,81,82,83,84,85,86,87,88,91,92,93,94,95,96,97,98,99,102,103,104
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`%N Numbers whose base-11 representation has the same number of 1's and 2's.
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`%t Select[Range[0,120],DigitCount[#,11,1]==DigitCount[#,11,2]&] (* _Harvey P. Dale_, Dec 10 2016 *)
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`%K nonn,base,easy
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`%O 1,2
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`%A _Olivier GĂ©rard_
`