A039249 Numbers whose base-12 representation has the same number of 4's and 7's.

0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 44, 45, 46, 47, 55, 60, 61, 62, 63, 65, 66, 68, 69, 70, 71, 72, 73, 74, 75, 77, 78, 80, 81, 82, 83, 88, 96, 97, 98, 99, 101, 102, 104

Offset

1,3

Links

Table of n, a(n) for n=1..69.

Mathematica

Select[Range[0, 150], DigitCount[#, 12, 4]==DigitCount[#, 12, 7]&] (* Harvey P. Dale, Jul 22 2020 *)

Crossrefs

Sequence in context: A075145 A086142 A258334 * A039191 A214329 A049386

Adjacent sequences: A039246 A039247 A039248 * A039250 A039251 A039252

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved