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A107273
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Vertically symmetrical dates MMDDYYYY (american notation) considered as numbers, in increasing order.
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0
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10011001, 10025001, 10052001, 10088001, 10100101, 10111101, 10125101, 10152101, 10188101, 10200501, 10211501, 10225501, 10252501, 10288501, 11011011, 11025011, 11052011, 11088011, 11100111, 11111111, 11125111
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 2 and 5 are taken as mirror images (as on calculator displays). a(1)=10011001 and a(20)=11111111 shared the property to present also two symmetrical halves.
This sequence has exactly 42 terms, ending with 12288551 (Dec. 28th 8551).
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CROSSREFS
| Cf. A053701, A106605.
Sequence in context: A087510 A173002 A139120 * A106605 A107275 A179507
Adjacent sequences: A107270 A107271 A107272 * A107274 A107275 A107276
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KEYWORD
| base,easy,fini,nonn
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AUTHOR
| Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), May 19 2005
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