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 A081316 Lexicographically earliest sequence of positive integers such that n occurs a(n)-1 times, starting at n=1. 1
 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; text; internal format)
 OFFSET 1,1 LINKS 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). CROSSREFS A081315 is the corresponding sequence for nonnegative integers, see also A001462. Sequence in context: A216084 A055101 A238165 * A226362 A228549 A079893 Adjacent sequences:  A081313 A081314 A081315 * A081317 A081318 A081319 KEYWORD easy,nonn AUTHOR Matthew Vandermast, Mar 18 2003 EXTENSIONS Definition edited by Benoit Jubin, May 01 2010 STATUS approved

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