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A045037 Numbers whose base-4 representation contains exactly four 0's and four 1's. 1
16405, 16453, 16465, 16468, 16645, 16657, 16660, 16705, 16708, 16720, 17413, 17425, 17428, 17473, 17476, 17488, 17665, 17668, 17680, 17728, 20485, 20497, 20500, 20545, 20548, 20560, 20737, 20740, 20752, 20800 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[20000], DigitCount[#, 4, 0] == 4 && DigitCount[#, 4, 1] == 4 &] (* Vincenzo Librandi, Sep 23 2016 *)
CROSSREFS
Cf. A007090.
Sequence in context: A282597 A031673 A168507 * A168633 A122714 A133533
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)