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A045020 Numbers n with property that in base 4 representation the numbers of 0's and 1's are 1 and 2, respectively. 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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..9000

MATHEMATICA

Select[Range[10000], DigitCount[#, 4, 0] == 1 && DigitCount[#, 4, 1] == 2 &] (* Vincenzo Librandi, Sep 21 2016 *)

CROSSREFS

Sequence in context: A081643 A146169 A218864 * A069961 A140146 A039502

Adjacent sequences:  A045017 A045018 A045019 * A045021 A045022 A045023

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 28 17:15 EDT 2021. Contains 346335 sequences. (Running on oeis4.)