A039012 Numbers whose base-5 representation has the same number of 1's and 4's.

0, 2, 3, 9, 10, 12, 13, 15, 17, 18, 21, 29, 39, 44, 45, 47, 48, 50, 52, 53, 59, 60, 62, 63, 65, 67, 68, 71, 75, 77, 78, 84, 85, 87, 88, 90, 92, 93, 96, 101, 105, 107, 108, 111, 116, 129, 139, 144, 145, 147, 148, 174, 179, 189, 194, 195, 197, 198, 204, 214, 219, 220

Offset: 1

Author

Olivier Gérard

Keywords

• nonn
• base
• easy

Links

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

Crossrefs

Cf. A007091.

Programs

Mathematica

Select[Range[0,250],DigitCount[#,5,1]==DigitCount[#,5,4]&] (* Harvey P. Dale, Jul 14 2022 *)