A043943 Numbers k such that 1 and 6 occur juxtaposed in the base-8 representation of k but not of k+1.

14, 49, 78, 119, 142, 177, 206, 241, 270, 305, 334, 369, 399, 433, 462, 497, 526, 561, 590, 631, 654, 689, 718, 753, 782, 817, 846, 881, 959, 974, 1009, 1038, 1073, 1102, 1143, 1166, 1201, 1230, 1265, 1294, 1329, 1358, 1393

Offset

1,1

Links

Table of n, a(n) for n=1..43.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 8], {1, 6}]>0 || SequenceCount[IntegerDigits[n, 8], {6, 1}]>0, 1, 0], {n, 1400}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 30 2021 *)

Crossrefs

Cf. A007094.

Sequence in context: A250973 A039340 A043163 * A367360 A308834 A084049

Adjacent sequences: A043940 A043941 A043942 * A043944 A043945 A043946

Keyword

nonn,base

Author

Clark Kimberling

Status

approved