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A031492
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Numbers whose base-9 representation has the same number of 0's as 8's.
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0
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1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23, 24, 25, 28, 29, 30, 31, 32, 33, 34, 37, 38, 39, 40, 41, 42, 43, 46, 47, 48, 49, 50, 51, 52, 55, 56, 57, 58, 59, 60, 61, 64, 65, 66, 67, 68, 69, 70, 72, 89, 91, 92, 93, 94, 95
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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Select[Range@100, (s=#; Differences[Count[IntegerDigits[s, 9], #]&/@{0, 8}]=={0})&] (* Giorgos Kalogeropoulos, Jul 04 2021 *)
Select[Range[100], DigitCount[#, 9, 0]==DigitCount[#, 9, 8]&] (* Harvey P. Dale, Mar 09 2023 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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