A039108 Numbers whose base-9 representation has the same number of 5's and 8's.

0, 1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 13, 15, 16, 18, 19, 20, 21, 22, 24, 25, 27, 28, 29, 30, 31, 33, 34, 36, 37, 38, 39, 40, 42, 43, 53, 54, 55, 56, 57, 58, 60, 61, 63, 64, 65, 66, 67, 69, 70, 77, 81, 82, 83, 84, 85, 87, 88, 90, 91, 92, 93, 94, 96, 97, 99, 100, 101, 102

Offset

1,3

Links

Chris R. Rehmann, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[0, 150], DigitCount[#, 9, 5]==DigitCount[#, 9, 8]&] (* Harvey P. Dale, Aug 28 2020 *)

Prog

(MATLAB) x = 0:21523; d = dec2base(x, 9)-'0'; a = x(sum(d==5, 2)==sum(d==8, 2)); disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Mar 25 2026

Crossrefs

Cf. A007095, A039389.

Cf. A039106, A039107.

Cf. A031492, A039090, A039096, A039101, A039105, A039110, A039111.

Sequence in context: A286057 A039148 A065904 * A020756 A051382 A026514

Adjacent sequences: A039105 A039106 A039107 * A039109 A039110 A039111

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved