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A044170 Numbers n such that string 4,4 occurs in the base 7 representation of n but not of n-1. 0
32, 81, 130, 179, 224, 277, 326, 375, 424, 473, 522, 567, 620, 669, 718, 767, 816, 865, 910, 963, 1012, 1061, 1110, 1159, 1208, 1253, 1306, 1355, 1404, 1453, 1502, 1551, 1568, 1649, 1698, 1747, 1796, 1845, 1894, 1939, 1992 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..41.

MATHEMATICA

Select[Range[2000], MemberQ[Partition[IntegerDigits[#, 7], 2, 1], {4, 4}] && !MemberQ[Partition[IntegerDigits[#-1, 7], 2, 1], {4, 4}]&] (* Harvey P. Dale, Jan 17 2014 *)

CROSSREFS

Sequence in context: A203447 A340701 A043410 * A044551 A256810 A256803

Adjacent sequences:  A044167 A044168 A044169 * A044171 A044172 A044173

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 27 06:18 EST 2022. Contains 350601 sequences. (Running on oeis4.)