A039359 Numbers whose base-9 representation has the same nonzero number of 0's and 3's.

27, 84, 108, 165, 189, 244, 245, 247, 248, 249, 250, 251, 252, 261, 279, 288, 297, 306, 315, 327, 351, 408, 432, 489, 513, 570, 594, 651, 675, 741, 750, 757, 758, 760, 761, 762, 763, 764, 768, 777, 786, 795, 804, 813, 837, 894, 918, 973, 974, 976, 977, 978

Offset

1,1

Links

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

Mathematica

Select[Range[1000], DigitCount[#, 9, 0]==DigitCount[#, 9, 3]>0&] (* Harvey P. Dale, Sep 23 2018 *)

Prog

(MATLAB)
a = NaN(52, 1); k = 0; j = 1;
while any(isnan(a))
    d = dec2base(k, 9)-'0';
    n1 = sum(d==0); n2 = sum(d==3);
    if n1==n2 && n1 > 0
        a(j) = k; j = j+1;
    end
    k = k+1;
end
disp(regexprep(num2str(a'), ' +', ', ')) % Chris R. Rehmann, Apr 03 2026

Crossrefs

Cf. A007095, A039079.

Cf. A039357, A039358, A039360, A039361, A039362, A039363, A039364.

Cf. A039366, A039372.

Sequence in context: A251081 A161340 A043182 * A043962 A386541 A035074

Adjacent sequences: A039356 A039357 A039358 * A039360 A039361 A039362

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved