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A039085
Numbers whose base-9 representation has the same number of 1's and 3's.
0
0, 2, 4, 5, 6, 7, 8, 12, 18, 20, 22, 23, 24, 25, 26, 28, 36, 38, 40, 41, 42, 43, 44, 45, 47, 49, 50, 51, 52, 53, 54, 56, 58, 59, 60, 61, 62, 63, 65, 67, 68, 69, 70, 71, 72, 74, 76, 77, 78, 79, 80, 84, 102, 108, 110, 112, 113, 114, 115, 116, 120, 129, 138, 147, 156, 162
OFFSET
1,2
MATHEMATICA
Select[Range[0, 200], DigitCount[#, 9, 1]==DigitCount[#, 9, 3]&] (* Harvey P. Dale, Aug 08 2023 *)
CROSSREFS
Cf. A007095.
Sequence in context: A058049 A091871 A303393 * A302433 A326749 A327111
KEYWORD
nonn,base,easy
STATUS
approved