A045023 Numbers whose base-4 representation contains exactly two 0's and no 1's.

32, 48, 130, 131, 136, 140, 160, 176, 194, 195, 200, 204, 224, 240, 522, 523, 526, 527, 546, 547, 552, 556, 562, 563, 568, 572, 642, 643, 648, 652, 672, 688, 706, 707, 712, 716, 736, 752, 778, 779, 782, 783, 802, 803, 808, 812

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..2000

Mathematica

Select[Range[1000], DigitCount[#, 4, 0] == 2 &&DigitCount[#, 4, 1] == 0 &] (* Vincenzo Librandi, Sep 21 2016 *)

Crossrefs

Cf. A007090.

Sequence in context: A043202 A043982 A236330 * A222300 A259770 A066472

Adjacent sequences: A045020 A045021 A045022 * A045024 A045025 A045026

Keyword

nonn,base

Author

Clark Kimberling

Status

approved