A039095 Numbers whose base-9 representation has the same number of 2's and 7's.

0, 1, 3, 4, 5, 6, 8, 9, 10, 12, 13, 14, 15, 17, 25, 27, 28, 30, 31, 32, 33, 35, 36, 37, 39, 40, 41, 42, 44, 45, 46, 48, 49, 50, 51, 53, 54, 55, 57, 58, 59, 60, 62, 65, 72, 73, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 89, 90, 91, 93, 94, 95, 96, 98, 106, 108, 109, 111

Offset

1,3

Links

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

Mathematica

Select[Range[0, 200], DigitCount[#, 9, 2]==DigitCount[#, 9, 7]&] (* Harvey P. Dale, Oct 15 2022 *)

Prog

(MATLAB) x = 0:25112; d = dec2base(x, 9)-'0'; a = x(sum(d==2, 2)==sum(d==7, 2)); disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Mar 16 2026

Crossrefs

Cf. A007095, A039376.

Cf. A039091, A039092, A039093, A039094, A039096.

Cf. A039083, A039089, A039100, A039104, A039107, A039109.

Sequence in context: A241403 A287727 A298606 * A001957 A184484 A253897

Adjacent sequences: A039092 A039093 A039094 * A039096 A039097 A039098

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved