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A044402
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Numbers n such that string 7,0 occurs in the base 10 representation of n but not of n-1.
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1
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70, 170, 270, 370, 470, 570, 670, 700, 770, 870, 970, 1070, 1170, 1270, 1370, 1470, 1570, 1670, 1700, 1770, 1870, 1970, 2070, 2170, 2270, 2370, 2470, 2570, 2670, 2700, 2770, 2870, 2970, 3070, 3170, 3270, 3370, 3470, 3570
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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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SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {7, 0}]>0, 1, 0], {n, 3600}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 11 2020 *)
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CROSSREFS
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Sequence in context: A044702 A063320 A255793 * A044783 A278782 A154361
Adjacent sequences: A044399 A044400 A044401 * A044403 A044404 A044405
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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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