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Search: id:A135696
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| A135696 |
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Palindromes with odd number of digits formed from the reflected decimal expansion of e. |
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+0
4
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| 2, 272, 27172, 2718172, 271828172, 27182828172, 2718281828172, 271828181828172, 27182818281828172, 2718281828281828172, 271828182848281828172, 27182818284548281828172
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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e = 2.71828182845904523536028747135... (See A001113).
The number of digits of a(n) is equal to 2n-1.
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EXAMPLE
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n ............ a(n)
1 ............. 2
2 ............ 272
3 ........... 27172
4 .......... 2718172
5 ......... 271828172
6 ........ 27182828172
7 ....... 2718281828172
8 ...... 271828181828172
9 ..... 27182818281828172
10 ... 2718281828281828172
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CROSSREFS
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Cf. A001113, A002113.
Sequence in context: A135388 A007512 A048534 this_sequence A008775 A119553 A093938
Adjacent sequences: A135693 A135694 A135695 this_sequence A135697 A135698 A135699
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KEYWORD
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base,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Mar 01 2008, corrected Mar 02 2008
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