A039365 Numbers whose base-9 representation has the same nonzero number of 1's and 2's.

11, 19, 83, 99, 102, 103, 104, 105, 106, 107, 110, 119, 128, 137, 146, 155, 163, 171, 174, 175, 176, 177, 178, 179, 190, 199, 208, 217, 226, 235, 254, 262, 335, 343, 416, 424, 497, 505, 578, 586, 659, 667, 731, 747, 750, 751, 752, 753, 754, 755, 758, 767, 776

Offset

1,1

Links

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

Mathematica

Select[Range[1000], DigitCount[#, 9, 1]==DigitCount[#, 9, 2]>0&] (* Harvey P. Dale, Jun 08 2022 *)

Prog

(MATLAB) x = 0:776; d = dec2base(x, 9)-'0'; s1 = sum(d==1, 2); s2 = sum(d==2, 2); a = x(s1==s2 & s1>0); disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Apr 04 2026

Crossrefs

Cf. A007095, A039084.

Cf. A039366, A039367, A039368, A039369, A039370, A039371.

Cf. A039358.

Sequence in context: A106231 A107637 A229542 * A386040 A103201 A199338

Adjacent sequences: A039362 A039363 A039364 * A039366 A039367 A039368

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved