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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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9
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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;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Giovanni Resta, Table of n, a(n) for n = 1..10000
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EXAMPLE
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a(11)=99 since 99, 198, 297, 396, 495, 594, 693, 792, 891, 990, and 1089 all contain a 9.
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CROSSREFS
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Cf. A039932, A039933, A039934, A039935, A039936, A039937, A039938, A039939.
Sequence in context: A110873 A167716 A087352 * A012111 A138998 A016838
Adjacent sequences: A039937 A039938 A039939 * A039941 A039942 A039943
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KEYWORD
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base,nonn
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AUTHOR
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Erich Friedman
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EXTENSIONS
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More terms from Patrick De Geest, Oct 15 1999
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STATUS
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approved
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