A039366 Numbers whose base-9 representation has the same nonzero number of 1's and 3's.

12, 28, 84, 102, 108, 110, 112, 113, 114, 115, 116, 120, 129, 138, 147, 156, 174, 190, 244, 252, 254, 256, 257, 258, 259, 260, 262, 280, 289, 298, 307, 316, 336, 352, 417, 433, 498, 514, 579, 595, 660, 676, 732, 750, 756, 758, 760, 761, 762, 763, 764, 768, 777

Offset

1,1

Links

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

Mathematica

Select[Range[800], DigitCount[#, 9, 1]==DigitCount[#, 9, 3]>0&] (* Harvey P. Dale, Aug 03 2017 *)

Prog

(MATLAB) x = 0:777; d = dec2base(x, 9)-'0'; s1 = sum(d==1, 2); s2 = sum(d==3, 2); a = x(s1==s2 & s1>0);  disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Apr 04 2026

Crossrefs

Cf. A007095, A039085.

Cf. A039365, A039367, A039368, A039369, A039370, A039371.

Cf. A039359, A039372.

Sequence in context: A164533 A034319 A097427 * A043189 A043969 A204386

Adjacent sequences: A039363 A039364 A039365 * A039367 A039368 A039369

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved