A045036 Numbers whose base-4 representation contains exactly four 0's and three 1's.

4101, 4113, 4116, 4161, 4164, 4176, 4353, 4356, 4368, 4416, 5121, 5124, 5136, 5184, 5376, 16406, 16407, 16409, 16413, 16421, 16437, 16454, 16455, 16457, 16461, 16466, 16467, 16472, 16476, 16481, 16484, 16497, 16500

Offset

1,1

Links

Table of n, a(n) for n=1..33.

Mathematica

Select[Range[20000], DigitCount[#, 4, 0]==4&&DigitCount[#, 4, 1]==3&] (* Harvey P. Dale, Jan 28 2012 *)

Crossrefs

Cf. A007090.

Sequence in context: A346327 A043476 A168191 * A345619 A346337 A345634

Adjacent sequences: A045033 A045034 A045035 * A045037 A045038 A045039

Keyword

nonn,base

Author

Clark Kimberling

Status

approved