A039018 - OEIS

A039018

Numbers whose base-6 representation has the same number of 0's and 3's.

1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 18, 25, 26, 28, 29, 31, 32, 34, 35, 39, 43, 44, 46, 47, 49, 50, 52, 53, 54, 61, 62, 64, 65, 67, 68, 70, 71, 75, 79, 80, 82, 83, 85, 86, 88, 89, 90, 97, 98, 100, 101, 103, 104, 106, 107, 109, 110, 112, 113, 114, 120, 132, 138, 147

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

filter:= proc(n) local L;

L:= convert(n, base, 6);

numboccur(0, L)=numboccur(3, L)

end proc:

select(filter, [$1..200]); # Robert Israel, May 30 2018

MATHEMATICA