A039386 Numbers whose base-9 representation has the same nonzero number of 4's and 8's.

44, 76, 125, 157, 206, 238, 287, 319, 332, 341, 350, 359, 377, 386, 395, 396, 397, 398, 399, 401, 402, 403, 449, 481, 530, 562, 611, 643, 652, 661, 670, 679, 684, 685, 686, 687, 689, 690, 691, 697, 706, 715, 773, 805, 854, 886, 935, 967, 1016, 1048

Offset

1,1

Links

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

Mathematica

Select[Range[1250], DigitCount[#, 9, 4]==DigitCount[#, 9, 8]>0&] (* Harvey P. Dale, Jan 18 2024 *)

Prog

(MATLAB) x = 0:1048; d = dec2base(x, 9)-'0'; s1 = sum(d==4, 2); s2 = sum(d==8, 2); a = x(s1==s2 & s1>0); disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Apr 13 2026

Crossrefs

Cf. A007095, A039105.

Cf. A039383, A039384, A039385.

Cf. A039364, A039371, A039377, A039382, A039389, A039391, A039392.

Sequence in context: A348345 A049103 A074172 * A043209 A043989 A050272

Adjacent sequences: A039383 A039384 A039385 * A039387 A039388 A039389

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved