A039389 Numbers whose base-9 representation has the same nonzero number of 5's and 8's.

53, 77, 134, 158, 215, 239, 296, 320, 377, 401, 413, 422, 431, 440, 449, 467, 476, 477, 478, 479, 480, 481, 483, 484, 539, 563, 620, 644, 653, 662, 671, 680, 689, 693, 694, 695, 696, 697, 699, 700, 707, 716, 782, 806, 863, 887, 944, 968, 1025, 1049

Offset

1,1

Links

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

Mathematica

Select[Range[1100], DigitCount[#, 9, 5]==DigitCount[#, 9, 8]>0&] (* Harvey P. Dale, May 17 2017 *)

Prog

(MATLAB) x = 0:1049; d = dec2base(x, 9)-'0'; s1 = sum(d==5, 2); s2 = sum(d==8, 2); a = x(s1==s2 & s1>0); disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Apr 14 2026

Crossrefs

Cf. A007095, A039108.

Cf. A039387, A039388.

Cf. A039364, A039371, A039377, A039382, A039386, A039391, A039392.

Sequence in context: A160041 A013538 A107309 * A043212 A043992 A032421

Adjacent sequences: A039386 A039387 A039388 * A039390 A039391 A039392

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved