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A043969
Numbers k such that 1 and 3 occur juxtaposed in the base-9 representation of k but not of k+1.
0
12, 28, 93, 116, 174, 190, 260, 271, 336, 352, 417, 433, 498, 514, 579, 595, 660, 676, 741, 757, 822, 845, 903, 919, 1052, 1065, 1081, 1146, 1162, 1227, 1243, 1308, 1324, 1389, 1405, 1470, 1486, 1551, 1574, 1632, 1648, 1718
OFFSET
1,1
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {1, 3}]>0 || SequenceCount[ IntegerDigits[n, 9], {3, 1}]>0, 1, 0], {n, 1800}], {1, 0}][[All, 1]] (* Harvey P. Dale, Feb 05 2023 *)
CROSSREFS
Cf. A007095.
Sequence in context: A097427 A039366 A043189 * A204386 A078441 A351104
KEYWORD
nonn,base
STATUS
approved