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Search: id:A057890
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| A057890 |
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In base 2, either a palindrome or becomes a palindrome if trailing 0's are omitted. |
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+0
6
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| 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17, 18, 20, 21, 24, 27, 28, 30, 31, 32, 33, 34, 36, 40, 42, 45, 48, 51, 54, 56, 60, 62, 63, 64, 65, 66, 68, 72, 73, 80, 84, 85, 90, 93, 96, 99, 102, 107, 108, 112, 119, 120, 124, 126, 127, 128, 129, 130, 132, 136, 144, 146
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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Symmetric bit strings (bit-reverse palindromes), including as many leading as trailing zeros.
Fixed points of A057889, complement of A057891
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EXAMPLE
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10 is included, since 01010 is a palindrome, but 11 isn't because 1011 isn't.
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PROGRAM
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(PARI) for(n=1, 225, print(n, binary(n)))
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CROSSREFS
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Cf. A030101, A000265, A006519, A006995, A057889, A057891.
Cf. A061917, A006995, A062019.
Sequence in context: A108549 A045779 A062014 this_sequence A136490 A129523 A070331
Adjacent sequences: A057887 A057888 A057889 this_sequence A057891 A057892 A057893
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KEYWORD
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easy,nonn,base,nice
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AUTHOR
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Marc LeBrun (mlb(AT)well.com), Sep 25 2000
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