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A039073 Numbers whose base-8 representation has the same number of 4's and 7's. 0
0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 13, 14, 16, 17, 18, 19, 21, 22, 24, 25, 26, 27, 29, 30, 39, 40, 41, 42, 43, 45, 46, 48, 49, 50, 51, 53, 54, 60, 64, 65, 66, 67, 69, 70, 72, 73, 74, 75, 77, 78, 80, 81, 82, 83, 85, 86, 88, 89, 90, 91, 93, 94, 103, 104, 105, 106, 107, 109 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..68.

MATHEMATICA

b847Q[n_]:=Module[{dcn=DigitCount[n, 8]}, dcn[[4]]==dcn[[7]]]; Select[ Range[ 0, 150], b847Q] (* Harvey P. Dale, Oct 20 2011 *)

CROSSREFS

Sequence in context: A183572 A285962 A047450 * A026359 A032953 A270813

Adjacent sequences:  A039070 A039071 A039072 * A039074 A039075 A039076

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified October 19 09:22 EDT 2021. Contains 348074 sequences. (Running on oeis4.)