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A081315
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Lexicographically earliest sequence of positive integers such that n occurs a(n)-1 times, starting at n=0.
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1
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1, 2, 3, 2, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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EXAMPLE
| a(2)=3 because 2 appears a total of 3 times in the two sequences: once in A001477, once as a(1) in this sequence and once as a(3). The number 2 cannot be chosen as a(2) because that would mark the third appearance of 2, creating a contradiction; neither a(2)=3 nor the subsequent a(3)=2 creates any contradiction, however.
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CROSSREFS
| Sequence for positive integers is A081316, see also A001462.
Sequence in context: A087437 A168231 A205546 * A035662 A145394 A179806
Adjacent sequences: A081312 A081313 A081314 * A081316 A081317 A081318
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KEYWORD
| easy,nonn
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AUTHOR
| Matthew Vandermast (ghodges14(AT)comcast.net), Mar 17 2003
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EXTENSIONS
| Definition edited by Benoit Jubin, May 01 2010
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