A039387 Numbers whose base-9 representation has the same nonzero number of 5's and 6's.

51, 59, 132, 140, 213, 221, 294, 302, 375, 383, 411, 420, 429, 438, 447, 459, 460, 461, 462, 463, 466, 467, 474, 483, 491, 500, 509, 518, 527, 531, 532, 533, 534, 535, 538, 539, 554, 563, 618, 626, 699, 707, 780, 788, 861, 869, 942, 950, 1023, 1031

Offset

1,1

Links

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

Mathematica

Select[Range[1200], DigitCount[#, 9, 5]==DigitCount[#, 9, 6]>0&] (* Harvey P. Dale, Nov 17 2018 *)

Prog

(MATLAB) x = 0:1031; d = dec2base(x, 9)-'0'; s1 = sum(d==5, 2); s2 = sum(d==6, 2); a = x(s1==s2 & s1>0); disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Apr 13 2026

Crossrefs

Cf. A007095, A039106.

Cf. A039388, A039389.

Cf. A039362, A039369, A039375, A039380, A039384.

Sequence in context: A373205 A031410 A308766 * A043210 A043990 A297829

Adjacent sequences: A039384 A039385 A039386 * A039388 A039389 A039390

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved