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A045064 Numbers whose base-4 representation contains no 0's and exactly three 3's. 2
63, 127, 191, 223, 239, 247, 251, 253, 254, 383, 447, 479, 495, 503, 507, 509, 510, 639, 703, 735, 751, 759, 763, 765, 766, 863, 879, 887, 891, 893, 894, 927, 943, 951, 955, 957, 958, 983, 987, 989, 990, 999, 1003, 1005, 1006, 1013 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[7000], DigitCount[#, 4, 0] == 0 && DigitCount[#, 4, 3] == 3 &] (* Vincenzo Librandi, Sep 21 2016 *)
CROSSREFS
Different from A031468.
Cf. A007090.
Sequence in context: A080947 A023720 A031468 * A043450 A031491 A044250
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified May 26 18:19 EDT 2024. Contains 372840 sequences. (Running on oeis4.)