A039215 Numbers whose base-12 representation has the same number of 0's and 6's.

1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 85, 86, 87, 88, 89, 91, 92, 93, 94

Offset: 1

Author

Olivier Gérard

Keywords

• nonn
• base
• easy

Programs

Magma

[n: n in [1..120] | Multiplicity(S, 0) eq Multiplicity(S, 6) where S is {*d: d in Intseq(n, 12)*}]; // Vincenzo Librandi, Oct 26 2016

Mathematica

Select[Range[200], DigitCount[#, 12, 6] == DigitCount[#, 12, 0]&] (* Vincenzo Librandi, Oct 26 2016 *)