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A043166
Numbers k such that 2 and 4 occur juxtaposed in the base-8 representation of k but not of k-1.
0
20, 34, 84, 98, 148, 160, 212, 226, 272, 290, 340, 354, 404, 418, 468, 482, 532, 546, 596, 610, 660, 672, 724, 738, 784, 802, 852, 866, 916, 930, 980, 994, 1044, 1058, 1108, 1122, 1172, 1184, 1236, 1250, 1280, 1364, 1378, 1428
OFFSET
1,1
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 8], {2, 4}]>0 || SequenceCount[ IntegerDigits[n, 8], {4, 2}]>0, 1, 0], {n, 1500}], {0, 1}][[All, 2]] (* Harvey P. Dale, Sep 07 2021 *)
CROSSREFS
Cf. A007094.
Sequence in context: A108669 A293694 A039343 * A043946 A160937 A060124
KEYWORD
nonn,base
STATUS
approved