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A044150 Numbers n such that string 1,5 occurs in the base 7 representation of n but not of n-1. 0
12, 61, 84, 110, 159, 208, 257, 306, 355, 404, 427, 453, 502, 551, 588, 649, 698, 747, 770, 796, 845, 894, 943, 992, 1041, 1090, 1113, 1139, 1188, 1237, 1286, 1335, 1384, 1433, 1456, 1482, 1531, 1580, 1629, 1678, 1727, 1776 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

Flatten[Position[Partition[Table[If[MemberQ[Partition[IntegerDigits[n, 7], 2, 1], {1, 5}], 1, 0], {n, 2000}], 2, 1], {0, 1}]]+1 (* Harvey P. Dale, Jan 16 2015 *)

CROSSREFS

Sequence in context: A333969 A076504 A232700 * A044531 A304205 A240002

Adjacent sequences:  A044147 A044148 A044149 * A044151 A044152 A044153

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified June 12 06:52 EDT 2021. Contains 344943 sequences. (Running on oeis4.)