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A039337 Numbers whose base-8 representation has the same nonzero number of 1's and 3's. 1
11, 25, 67, 83, 88, 90, 92, 93, 94, 95, 99, 107, 115, 123, 139, 153, 193, 200, 202, 204, 205, 206, 207, 209, 225, 233, 241, 249, 267, 281, 331, 345, 395, 409, 459, 473, 515, 531, 536, 538, 540, 541, 542, 543, 547, 555, 563, 571, 603, 643, 659, 664, 666, 668 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[700], DigitCount[#, 8, 1]==DigitCount[#, 8, 3]>0&] (* Harvey P. Dale, Oct 24 2015 *)
PROG
(Python)
def ok(n): o = oct(n); return o.count('1') == o.count('3') > 0
print([k for k in range(669) if ok(k)]) # Michael S. Branicky, Nov 25 2021
CROSSREFS
Cf. A007094.
Sequence in context: A118648 A262105 A105270 * A043160 A043940 A220434
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved

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Last modified April 23 11:13 EDT 2024. Contains 371905 sequences. (Running on oeis4.)