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A044351
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Numbers n such that string 1,9 occurs in the base 10 representation of n but not of n-1.
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0
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19, 119, 190, 219, 319, 419, 519, 619, 719, 819, 919, 1019, 1119, 1190, 1219, 1319, 1419, 1519, 1619, 1719, 1819, 1900, 2019, 2119, 2190, 2219, 2319, 2419, 2519, 2619, 2719, 2819, 2919, 3019, 3119, 3190, 3219, 3319, 3419
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {1, 9}]>0, 1, 0], {n, 3500}], {0, 1}][[All, 2]] (* Harvey P. Dale, Jun 09 2022 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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