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A081316
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Lexicographically earliest sequence of positive integers such that n occurs a(n)-1 times, starting at n=1.
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1
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2, 3, 2, 1, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 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
| 1,1
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EXAMPLE
| a(1)=2 because a(1)=1 would create a contradiction (1 would have appeared twice in the two sequences, not once). a(1)=2 implies that 1 appears once in this sequence; the first term that can equal 1 without creating a contradiction is a(4).
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CROSSREFS
| A081315 is the corresponding sequence for nonnegative integers, see also A001462.
Sequence in context: A076549 A104411 A055101 * A079893 A113908 A065369
Adjacent sequences: A081313 A081314 A081315 * A081317 A081318 A081319
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KEYWORD
| easy,nonn
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AUTHOR
| Matthew Vandermast (ghodges14(AT)comcast.net), Mar 18 2003
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EXTENSIONS
| Definition edited by Benoit Jubin, May 01 2010
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