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Search: id:A140117
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A140117 Numbers n for which A140116(n) uses fewer symbols than A007088(n). +0
2
2, 4, 8, 15, 16, 31, 32, 33, 34, 63, 64, 65, 66, 68, 72, 125, 126, 127, 128, 129, 130, 131, 132, 136, 144, 160, 192, 247, 251, 253, 254, 255, 256, 257, 258, 259, 260, 264, 272, 288, 320, 384, 503, 507, 509, 510, 511, 512, 513, 514, 515, 516, 517, 518, 520, 521 (list; graph; listen)
OFFSET

1,1

COMMENT

The representation of n given by A140116(n) is more compact than the standard binary form of n for these numbers consisting of a sufficiently large proportion of 0s or of 1s among their bits.

EXAMPLE

See also examples for A140116. 2180 is a term here as 2180 = 100010000100 (base 2), which uses 12 symbols, but A140116(2180) = 10112111210, which uses only 11 symbols including the two delimiter symbols (for which 2 is used).

CROSSREFS

Cf. A140116, A007088.

Sequence in context: A078613 A072202 A076351 this_sequence A039743 A070008 A033623

Adjacent sequences: A140114 A140115 A140116 this_sequence A140118 A140119 A140120

KEYWORD

nonn

AUTHOR

Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 08 2008

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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