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Search: id:A141310
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| 1, 2, 3, 2, 5, 2, 7, 2, 9, 2, 11, 2, 13, 2, 15, 2, 17, 2, 19, 2, 21, 2, 23, 2, 25, 2, 27, 2, 29, 2, 31, 2, 33, 2, 35, 2, 37, 2, 39, 2, 41, 2, 43, 2, 45, 1, 47, 2, 49, 2, 51, 2, 53, 2, 55, 2, 57, 2, 59, 2
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Fundamental . For instance second of a family after 1, 0, 1, 0, 1, 0 =A059841 and before -1, 6, 5, 18, 23, 30, 53 = mix ( -1, 5, 23, 53 =A140811 ), differences (6, 18, 30 =A017593).
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FORMULA
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Differences: 1, 1, -1, 3, -3, 5, -5, 7, -7, 9, -9 = 1, (A005408, -A005408) .See A109613. a(n+1)-2a(n)= 0, -1, -4, 1, -8, 3 = mix -A008586, A060747.
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CROSSREFS
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Sequence in context: A079868 A088444 A108077 this_sequence A007389 A007388 A057815
Adjacent sequences: A141307 A141308 A141309 this_sequence A141311 A141312 A141313
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KEYWORD
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nonn,uned
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Aug 02 2008
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