A045103 - OEIS

A045103

Numbers whose base-4 representation contains exactly three 1's and three 2's.

1386, 1434, 1446, 1449, 1626, 1638, 1641, 1686, 1689, 1701, 2394, 2406, 2409, 2454, 2457, 2469, 2646, 2649, 2661, 2709, 4458, 4506, 4518, 4521, 4698, 4710, 4713, 4758, 4761, 4773, 5226, 5274, 5286, 5289, 5418, 5514

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..36.

MATHEMATICA

Select[Range[6000], DigitCount[#, 4, 1]==DigitCount[#, 4, 2]==3&] (* Harvey P. Dale, Sep 10 2011 *)

CROSSREFS

Cf. A007090.

Sequence in context: A060062 A181991 A212222 * A175695 A286837 A023090

Adjacent sequences: A045100 A045101 A045102 * A045104 A045105 A045106

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved