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A044779
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Numbers n such that string 6,6 occurs in the base 10 representation of n but not of n+1.
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0
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66, 166, 266, 366, 466, 566, 669, 766, 866, 966, 1066, 1166, 1266, 1366, 1466, 1566, 1669, 1766, 1866, 1966, 2066, 2166, 2266, 2366, 2466, 2566, 2669, 2766, 2866, 2966, 3066, 3166, 3266, 3366, 3466, 3566, 3669, 3766, 3866
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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], {6, 6}]>0, 1, 0], {n, 4000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Mar 28 2020 *)
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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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