A045027 Numbers whose base-4 representation contains exactly two 0's and four 1's.

1045, 1093, 1105, 1108, 1285, 1297, 1300, 1345, 1348, 1360, 4182, 4183, 4185, 4189, 4197, 4213, 4245, 4309, 4374, 4375, 4377, 4381, 4389, 4405, 4422, 4423, 4425, 4429, 4434, 4435, 4440, 4444, 4449, 4452, 4465, 4468

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..4300

Mathematica

Select[Range[10000], DigitCount[#, 4, 0] == 2 && DigitCount[#, 4, 1] == 4 &] (* Vincenzo Librandi, Sep 22 2016 *)

Crossrefs

Cf. A007090.

Sequence in context: A213811 A260205 A224604 * A345514 A345767 A324320

Adjacent sequences: A045024 A045025 A045026 * A045028 A045029 A045030

Keyword

nonn,base

Author

Clark Kimberling

Status

approved