A039384 Numbers whose base-9 representation has the same nonzero number of 4's and 6's.

42, 58, 123, 139, 204, 220, 285, 301, 330, 339, 348, 357, 375, 378, 379, 380, 381, 383, 385, 386, 393, 402, 447, 463, 490, 499, 508, 517, 522, 523, 524, 525, 527, 529, 530, 535, 553, 562, 609, 625, 690, 706, 771, 787, 852, 868, 933, 949, 1014, 1030, 1059, 1068

Offset

1,1

Links

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

Mathematica

Select[Range[0, 1068], DigitCount[#, 9, 4] == DigitCount[#, 9, 6] > 0 &] (* Chris R. Rehmann, Apr 12 2026 *)

Prog

(MATLAB) x = 0:1068; d = dec2base(x, 9)-'0'; s1 = sum(d==4, 2); s2 = sum(d==6, 2); a = x(s1==s2 & s1>0); disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Apr 12 2026

Crossrefs

Cf. A007095, A039103.

Cf. A039383, A039385, A039386.

Cf. A039362, A039369, A039375, A039380, A039387.

Sequence in context: A124656 A002706 A080971 * A043207 A043987 A300378

Adjacent sequences: A039381 A039382 A039383 * A039385 A039386 A039387

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved