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A045020
Numbers whose base-4 representation contains exactly one 0 and two 1's.
1
17, 20, 70, 71, 73, 77, 82, 83, 88, 92, 97, 100, 113, 116, 133, 145, 148, 197, 209, 212, 282, 283, 286, 287, 294, 295, 297, 301, 310, 311, 313, 317, 330, 331, 334, 335, 354, 355, 360, 364, 370, 371, 376, 380, 390, 391, 393, 397
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[10000], DigitCount[#, 4, 0] == 1 && DigitCount[#, 4, 1] == 2 &] (* Vincenzo Librandi, Sep 21 2016 *)
CROSSREFS
Cf. A007090.
Sequence in context: A081643 A146169 A218864 * A069961 A140146 A039502
KEYWORD
nonn,base
STATUS
approved