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Search: id:A106605
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| A106605 |
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Vertically symmetrical dates DDMMYYYY considered as numbers, in increasing order. |
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+0
6
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| 10011001, 10025001, 10052001, 10088001, 10100101, 10111101, 10125101, 11011011, 11025011, 11052011, 11088011, 11100111, 11111111, 11125111, 12011051, 12025051, 12052051, 12088051, 12100151, 12111151, 12125151
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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2 and 5 are taken as mirror images (as on calculator displays). a(1)=10011001, a(13)=11111111 and a(38)=20052005 (May 20 2005!) share the unique property to have also two symmetrical halves.
This sequence has exactly 70 terms, ending with 28125185 (28th Dec 5185).
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CROSSREFS
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Cf. A053701.
Sequence in context: A087510 A139120 A107273 this_sequence A107275 A155512 A155513
Adjacent sequences: A106602 A106603 A106604 this_sequence A106606 A106607 A106608
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KEYWORD
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base,easy,fini,nonn
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AUTHOR
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Nicolas Graner, Eric Angelini and Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), May 10 2005
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