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A044314
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Numbers n such that string 7,0 occurs in the base 9 representation of n but not of n-1.
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0
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63, 144, 225, 306, 387, 468, 549, 567, 630, 711, 792, 873, 954, 1035, 1116, 1197, 1278, 1296, 1359, 1440, 1521, 1602, 1683, 1764, 1845, 1926, 2007, 2025, 2088, 2169, 2250, 2331, 2412, 2493, 2574, 2655, 2736, 2754, 2817
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..39.
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MATHEMATICA
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Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {7, 0}]>0, 1, 0], {n, 3000}], {0, 1}]][[2]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, Sep 06 2015 *)
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CROSSREFS
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Sequence in context: A044631 A045136 A031895 * A044695 A211850 A330433
Adjacent sequences: A044311 A044312 A044313 * A044315 A044316 A044317
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KEYWORD
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nonn,base
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AUTHOR
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Clark Kimberling
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STATUS
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approved
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