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A044349 Numbers n such that string 1,7 occurs in the base 10 representation of n but not of n-1. 0
17, 117, 170, 217, 317, 417, 517, 617, 717, 817, 917, 1017, 1117, 1170, 1217, 1317, 1417, 1517, 1617, 1700, 1817, 1917, 2017, 2117, 2170, 2217, 2317, 2417, 2517, 2617, 2717, 2817, 2917, 3017, 3117, 3170, 3217, 3317, 3417 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {1, 7}]>0, 1, 0], {n, 3500}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jan 23 2021 *)
CROSSREFS
Sequence in context: A222370 A032692 A293877 * A044730 A086020 A056117
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified June 19 00:22 EDT 2024. Contains 373492 sequences. (Running on oeis4.)