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Search: id:A098728
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| A098728 |
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Consider the sequence {b(n), n >= 1} of digits of the natural (or counting) numbers: 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0... (A007376); a(n) = n - b(n). |
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+0
2
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| 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 11, 11, 12, 13, 13, 15, 14, 17, 15, 19, 16, 21, 17, 23, 18, 25, 19, 27, 20, 28, 31, 30, 32, 32, 33, 34, 34, 36, 35, 38, 36, 40, 37, 42, 38, 44, 39, 46, 40, 47, 51, 49, 52, 51, 53, 53, 54, 55, 55, 57, 56, 59, 57, 61, 58, 63, 59, 65, 60, 66, 71, 68, 72
(list; graph; listen)
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OFFSET
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0,10
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COMMENT
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Subtract each digit of the counting numbers from its rank.
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EXAMPLE
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The sequence of digits of the counting numbers is
1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0...
The 15th term, for instance, is a 2. Thus 15-2=13 is the 15th term of this sequence.
Next one is a 1, thus 16 (the rank) - 1 (the 16th digit of the decimal expansion of the counting numbers) = 15, which is the 16th term of this sequence.
Next one is 17-3=14
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CROSSREFS
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Sequence in context: A119207 A165254 A058069 this_sequence A107576 A043698 A031954
Adjacent sequences: A098725 A098726 A098727 this_sequence A098729 A098730 A098731
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KEYWORD
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base,easy,nonn
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AUTHOR
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Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), Sep 30 2004
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EXTENSIONS
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More terms from Stacy Hawthorne (shawtho1(AT)ashland.edu), Jan 12 2006
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