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A050730
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Decimal expansion of 9^n contains no pair of consecutive equal digits (probably finite).
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1
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0, 1, 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 21, 33
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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EXAMPLE
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9^33 = 30903154382632612361920641803529.
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MAPLE
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q:= n-> (s-> andmap(i-> s[i]<>s[i+1], [$1..length(s)-1]))(""||(9^n)):
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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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