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A044755
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Numbers n such that string 4,2 occurs in the base 10 representation of n but not of n+1.
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0
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42, 142, 242, 342, 429, 442, 542, 642, 742, 842, 942, 1042, 1142, 1242, 1342, 1429, 1442, 1542, 1642, 1742, 1842, 1942, 2042, 2142, 2242, 2342, 2429, 2442, 2542, 2642, 2742, 2842, 2942, 3042, 3142, 3242, 3342, 3429, 3442
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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], {4, 2}]>0, 1, 0], {n, 3500}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 11 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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