A039085 Numbers whose base-9 representation has the same number of 1's and 3's.

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

Links

Table of n, a(n) for n=1..66.

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

Adjacent sequences: A039082 A039083 A039084 * A039086 A039087 A039088

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved