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A023718
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Numbers with a single 3 in their base 4 expansion.
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2
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3, 7, 11, 12, 13, 14, 19, 23, 27, 28, 29, 30, 35, 39, 43, 44, 45, 46, 48, 49, 50, 52, 53, 54, 56, 57, 58, 67, 71, 75, 76, 77, 78, 83, 87, 91, 92, 93, 94, 99, 103, 107, 108, 109, 110, 112, 113, 114, 116, 117, 118, 120, 121, 122, 131, 135
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Select[ Range[ 140 ], (Count[ IntegerDigits[ #, 4 ], 3 ]==1)& ]
Select[Range[150], DigitCount[#, 4, 3]==1&] (* Harvey P. Dale, May 07 2023 *)
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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