A043978 Numbers k such that 2 and 6 occur juxtaposed in the base-9 representation of k but not of k+1.

24, 56, 105, 137, 186, 224, 267, 299, 348, 380, 429, 461, 512, 542, 591, 623, 672, 704, 753, 785, 834, 866, 915, 953, 996, 1028, 1077, 1109, 1158, 1190, 1241, 1271, 1320, 1352, 1401, 1433, 1482, 1514, 1563, 1595, 1644, 1682

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {2, 6}]>0||SequenceCount[IntegerDigits[n, 9], {6, 2}]>0, 1, 0], {n, 2000}], {1, 0}][[;; , 1]] (* Harvey P. Dale, May 08 2025 *)

Crossrefs

Cf. A007095.

Sequence in context: A277108 A039375 A043198 * A211461 A208086 A232937

Adjacent sequences: A043975 A043976 A043977 * A043979 A043980 A043981

Keyword

nonn,base

Author

Clark Kimberling

Status

approved