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Numbers having exactly two 1's in base 9.
1

%I #15 Apr 18 2023 17:32:09

%S 10,82,90,92,93,94,95,96,97,98,100,109,118,127,136,145,154,172,253,

%T 334,415,496,577,658,730,738,740,741,742,743,744,745,746,748,757,766,

%U 775,784,793,802,810,812,813,814,815,816,817,818,828,830,831,832,833,834

%N Numbers having exactly two 1's in base 9.

%H Harvey P. Dale, <a href="/A043458/b043458.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[1000],DigitCount[#,9,1]==2&] (* _Harvey P. Dale_, Apr 18 2023 *)

%Y Cf. A007095.

%K nonn,base

%O 1,1

%A _Clark Kimberling_