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A043384
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Numbers having four 3's in base 6.
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1
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777, 2073, 3369, 4017, 4233, 4449, 4557, 4593, 4629, 4647, 4653, 4659, 4662, 4663, 4664, 4666, 4667, 4671, 4677, 4701, 4737, 4881, 5097, 5961, 7257, 8553, 9849, 11145, 11793, 12009, 12225, 12333, 12369, 12405, 12423, 12429
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OFFSET
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1,1
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COMMENTS
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k is in the sequence iff either k == 3 (mod 6) and floor(k/6) is in A043383, or k !== 3 (mod 6) and floor(k/6) is in the sequence. - Robert Israel, Jul 24 2018
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LINKS
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Robert Israel, Table of n, a(n) for n = 1..10000
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MAPLE
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filter:= n -> numboccur(3, convert(n, base, 6))=4:
select(filter, [$1..20000]); # Robert Israel, Jul 24 2018
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CROSSREFS
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Cf. A007092.
Sequence in context: A202893 A204300 A043519 * A237162 A252529 A008746
Adjacent sequences: A043381 A043382 A043383 * A043385 A043386 A043387
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KEYWORD
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nonn,base
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AUTHOR
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Clark Kimberling
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STATUS
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approved
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