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A057891
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In base 2, neither a palindrome nor becomes a palindrome if trailing 0's are omitted.
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5
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11, 13, 19, 22, 23, 25, 26, 29, 35, 37, 38, 39, 41, 43, 44, 46, 47, 49, 50, 52, 53, 55, 57, 58, 59, 61, 67, 69, 70, 71, 74, 75, 76, 77, 78, 79, 81, 82, 83, 86, 87, 88, 89, 91, 92, 94, 95, 97, 98, 100, 101, 103, 104, 105, 106, 109, 110, 111, 113, 114, 115, 116, 117, 118
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| These could be called "asymmetric bit strings".
Fixed pairs of A057889, complement of A057890
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LINKS
| Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
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FORMULA
| A030101(A030101(n)) != A030101(n). - David Wilson, Jun 09 2009, Jun 18 2009
A178225(A000265(a(n))) = 0. [Reinhard Zumkeller, Oct 21 2011]
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EXAMPLE
| 11 is included because 1011 is asymmetrical, but 12 is not because 001100 is a palindrome.
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PROG
| (Haskell)
a057891 n = a057891_list !! (n-1)
a057891_list = filter ((== 0) . a178225 . a000265) [1..]
-- Reinhard Zumkeller, Oct 21 2011
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CROSSREFS
| Cf. A061917, A006995. Complement of A057890.
Cf. A030101, A000265, A006519, A057889.
Sequence in context: A136491 A005360 A062019 * A164708 A030792 A101934
Adjacent sequences: A057888 A057889 A057890 * A057892 A057893 A057894
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KEYWORD
| easy,nonn,base
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AUTHOR
| Marc LeBrun (mlb(AT)well.com), Sep 25 2000
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EXTENSIONS
| Edited by N. J. A. Sloane, Jun 09 2009 at the suggestion of Ray Chandler.
A-numbers in formula corrected by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 18 2009
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