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Search: id:A039940
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| A039940 |
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Smallest k for which k, 2k, ... nk all contain the digit 9. |
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+0
1
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| 9, 49, 97, 98, 98, 99, 99, 99, 99, 99, 99, 499, 992, 993, 993, 994, 994, 994, 995, 995, 995, 995, 996, 996, 996, 996, 996, 997, 997, 997, 997, 997, 997, 997, 997, 997, 997, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(11)=99 since 99,198,297,396,495,594,693,792,891,990,1089 all contain a 9.
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CROSSREFS
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Adjacent sequences: A039937 A039938 A039939 this_sequence A039941 A039942 A039943
Sequence in context: A032598 A110873 A087352 this_sequence A012111 A016838 A087691
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KEYWORD
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base,nonn
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AUTHOR
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Erich Friedman (erich.friedman(AT)stetson.edu)
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EXTENSIONS
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More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1999.
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