Voozh

A044156

Numbers n such that string 2,4 occurs in the base 7 representation of n but not of n-1.

18, 67, 116, 126, 165, 214, 263, 312, 361, 410, 459, 469, 508, 557, 606, 655, 704, 753, 802, 812, 851, 882, 949, 998, 1047, 1096, 1145, 1155, 1194, 1243, 1292, 1341, 1390, 1439, 1488, 1498, 1537, 1586, 1635, 1684, 1733, 1782

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {2, 4}]>0, 1, 0], {n, 1800}], {0, 1}][[;; , 2]] (* Harvey P. Dale, May 01 2023 *)

CROSSREFS

Sequence in context: A264652 A010006 A237616 * A044537 A143859 A063523

Adjacent sequences: A044153 A044154 A044155 * A044157 A044158 A044159

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

URL: https://oeis.org/A044156

⇱ A044156 - OEIS