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Search: id:A010097
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| A010097 |
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Prefix (or Levenshtein) codes for natural numbers. |
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+0
1
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| 0, 2, 12, 13, 112, 113, 114, 115, 232, 233, 234, 235, 236, 237, 238, 239, 3840, 3841, 3842, 3843, 3844, 3845, 3846, 3847, 3848, 3849, 3850, 3851, 3852, 3853, 3854, 3855, 7712, 7713, 7714, 7715
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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R. E. Krichevsky, Szhatie i poisk informatsii (Compressing and searching for information), Moscow, 1988, ISBN 5-256-00325-9.
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FORMULA
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The code for n is found as follows: from right to left, the truncated (without the leading 1) binary representations of n, int(log2(n)), int(log2(int(log2(n)))), etc., are written as long as they consist of at least one bit; then we write a 0 followed by log*(n) 1's.
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CROSSREFS
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Sequence in context: A072483 A081539 A141273 this_sequence A103761 A078755 A086285
Adjacent sequences: A010094 A010095 A010096 this_sequence A010098 A010099 A010100
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KEYWORD
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nonn
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AUTHOR
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Leonid Broukhis (leob(AT)mailcom.com)
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