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Search: id:A138145
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| A138145 |
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Palindromes formed from the reflected decimal expansion of the concatenation of 1, 1, 1 and infinite 0's. |
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+0
13
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| 1, 11, 111, 1111, 11111, 111111, 1110111, 11100111, 111000111, 1110000111, 11100000111, 111000000111, 1110000000111, 11100000000111, 111000000000111, 1110000000000111, 11100000000000111, 111000000000000111
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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a(n) is also A147596(n) written in base 2. [From Omar E. Pol (info(AT)polprimos.com), Nov 08 2008]
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EXAMPLE
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n .... a(n)
1 .... 1
2 .... 11
3 .... 111
4 .... 1111
5 .... 11111
6 .... 111111
7 .... 1110111
8 .... 11100111
9 .... 111000111
10 ... 1110000111
11 ... 11100000111
12 ... 111000000111
13 ... 1110000000111
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CROSSREFS
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Cf. A000533, A138144.
Cf. A138118, A138119, A138120, A138146, A138721, A138826, A147596. [From Omar E. Pol (info(AT)polprimos.com), Nov 08 2008]
Sequence in context: A138144 A090103 A061851 this_sequence A165370 A134962 A113589
Adjacent sequences: A138142 A138143 A138144 this_sequence A138146 A138147 A138148
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KEYWORD
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easy,nonn,base
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Mar 29 2008
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EXTENSIONS
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Better definition. - Omar E. Pol (info(AT)polprimos.com), Nov 16 2008
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