A043504 Numbers having four 3's in base 10.

3333, 13333, 23333, 30333, 31333, 32333, 33033, 33133, 33233, 33303, 33313, 33323, 33330, 33331, 33332, 33334, 33335, 33336, 33337, 33338, 33339, 33343, 33353, 33363, 33373, 33383, 33393, 33433, 33533, 33633, 33733

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Links

• Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Crossrefs

Subsequence of A011533.

Programs

Mathematica

Select[Range[34000],DigitCount[#,10,3]==4&]  (* Harvey P. Dale, Feb 02 2011 *)