A039251 Numbers whose base-12 representation has the same number of 4's and 9's.

0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 46, 47, 57, 60, 61, 62, 63, 65, 66, 67, 68, 70, 71, 72, 73, 74, 75, 77, 78, 79, 80, 82, 83, 84, 85, 86, 87, 89, 90, 91, 92, 94

Offset: 1

Author

Olivier Gérard

Keywords

• nonn
• base
• easy

Programs

Mathematica

Select[Range[0,100],DigitCount[#,12,4]==DigitCount[#,12,9]&] (* Harvey P. Dale, Jun 06 2016 *)