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Numbers with exactly 2 0's in their base 5 expansion.
2

%I #13 Sep 14 2023 08:15:03

%S 25,50,75,100,126,127,128,129,130,135,140,145,150,175,200,225,251,252,

%T 253,254,255,260,265,270,275,300,325,350,376,377,378,379,380,385,390,

%U 395,400,425,450,475,501,502,503,504,505,510

%N Numbers with exactly 2 0's in their base 5 expansion.

%H Seiichi Manyama, <a href="/A023723/b023723.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[ Range[ 600 ], (Count[ IntegerDigits[ #, 5 ], 0 ]==2)& ]

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_