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Search: id:A054684
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| 1, 3, 5, 7, 9, 10, 12, 14, 16, 18, 21, 23, 25, 27, 29, 30, 32, 34, 36, 38, 41, 43, 45, 47, 49, 50, 52, 54, 56, 58, 61, 63, 65, 67, 69, 70, 72, 74, 76, 78, 81, 83, 85, 87, 89, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 111, 113, 115, 117, 119, 120, 122, 124, 126, 128, 131
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n) = n * 2 - 1 for the first 5 numbers; a(n) = n * 2 for the second 5 numbers (recurrence)
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EXAMPLE
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1, 3, 5, 7, 9, 10(1), 12(3), 14(5), 16(7), 18(9), 21(3) and so on.
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CROSSREFS
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Cf. A054683.
Sequence in context: A091066 A103848 A108598 this_sequence A080207 A091177 A066929
Adjacent sequences: A054681 A054682 A054683 this_sequence A054685 A054686 A054687
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KEYWORD
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nonn,easy,base
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AUTHOR
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Odimar Fabeny (fabeny(AT)terra.com.br), Apr 19 2000
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 19 2000
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