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A043893
Numbers k such that 2 and 3 occur juxtaposed in the base-5 representation of k but not of k+1.
0
13, 17, 38, 42, 63, 69, 89, 92, 113, 117, 138, 142, 163, 167, 188, 194, 214, 217, 238, 242, 263, 267, 288, 292, 313, 319, 349, 363, 367, 388, 392, 413, 417, 449, 464, 467, 488, 492, 513, 517, 538, 542, 563, 569, 589, 592, 613
OFFSET
1,1
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 5], {2, 3}]>0 || SequenceCount[IntegerDigits[n, 5], {3, 2}]>0, 1, 0], {n, 700}], {1, 0}] [[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jun 20 2021 *)
CROSSREFS
Cf. A007091.
Sequence in context: A039290 A045267 A043113 * A279392 A239901 A068497
KEYWORD
nonn,base
STATUS
approved