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A032701
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Exactly 5 digits from {1,2,3,4,5,6,7,8,9} can precede a(n) to form a lucky number.
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0
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19, 27, 31, 41, 253, 409, 567, 663, 827, 833, 977, 1089, 1421, 1475, 2635, 3021, 3419, 3633, 3781, 3953, 4197, 4293, 4423, 4721, 5255, 5671, 6187, 6469, 8187, 8467, 8661, 8837, 8989, 9615, 9921, 10477, 13569, 15055, 16037, 17637, 23597, 24693, 25273
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listen;
history;
text;
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OFFSET
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1,1
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COMMENTS
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Finding 6, 7, 8 and 9 preceding digits is a difficult job!
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LINKS
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Table of n, a(n) for n=1..43.
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EXAMPLE
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If n = 977 then we find only '1'977, '2'977, '4'977, '5'977 and '8'977 to be lucky numbers.
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CROSSREFS
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Cf. A000959.
Sequence in context: A274685 A152013 A160036 * A226726 A006626 A259054
Adjacent sequences: A032698 A032699 A032700 * A032702 A032703 A032704
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KEYWORD
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nonn,base,less
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AUTHOR
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Patrick De Geest, May 15 1998
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EXTENSIONS
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Terms > 10000 from R. J. Mathar, Oct 22 2010
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STATUS
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approved
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