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A044347
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Numbers n such that string 1,5 occurs in the base 10 representation of n but not of n-1.
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0
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15, 115, 150, 215, 315, 415, 515, 615, 715, 815, 915, 1015, 1115, 1150, 1215, 1315, 1415, 1500, 1615, 1715, 1815, 1915, 2015, 2115, 2150, 2215, 2315, 2415, 2515, 2615, 2715, 2815, 2915, 3015, 3115, 3150, 3215, 3315, 3415
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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, 5}]>0, 1, 0], {n, 3500}], {0, 1}][[All, 2]] (* Harvey P. Dale, Aug 02 2021 *)
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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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