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A210417
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List the positions of all digits 3 in the concatenation of all terms, not necessarily in order. This is the lexicographically earliest such sequence.
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8
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2, 3, 30, 6, 31, 9, 32, 13, 33, 12, 14, 21, 34, 25, 35, 29, 333, 3333, 36, 38, 42, 300, 47, 301, 52, 302, 57, 303, 59, 63, 66, 304, 71, 305, 76, 306, 81, 307, 86, 308, 91, 309, 96, 310, 102, 311, 108, 312, 113, 117, 313, 119, 126, 314, 130, 133, 134, 136, 139
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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See A210415 for comments, links, and code.
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LINKS
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EXAMPLE
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The sequence cannot start with 1 because the first digit is not 3. Let us start with 2: the second digit is equal to 3. So in the second position we have 3 and the third digit must be 3. Because 3 has been already used the minimum number starting with 3 is 30. And so on.
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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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EXTENSIONS
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STATUS
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approved
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