A039361 Numbers whose base-9 representation has the same nonzero number of 0's and 5's.

45, 86, 126, 167, 207, 248, 288, 329, 369, 406, 407, 408, 409, 411, 412, 413, 414, 423, 432, 441, 459, 468, 477, 491, 531, 572, 612, 653, 693, 743, 752, 761, 770, 775, 776, 777, 778, 780, 781, 782, 788, 797, 806, 815, 855, 896, 936, 977, 1017, 1058, 1098, 1135

Offset

1,1

Links

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

Mathematica

Select[Range[1135], DigitCount[#, 9, 0]==DigitCount[#, 9, 5]>0&] (* Chris R. Rehmann, Apr 04 2026 *)

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==5);
    if n1==n2 && n1 > 0
        a(j) = k; j = j+1;
    end
    k = k+1;
end
disp(regexprep(num2str(a'), ' +', ', ')) % Chris R. Rehmann, Apr 04 2026

Crossrefs

Cf. A007095, A039081.

Cf. A039357, A039358, A039359, A039360, A039362, A039363, A039364.

Cf. A039368, A039374, A039379, A039383.

Sequence in context: A280407 A063343 A043184 * A043964 A140380 A183625

Adjacent sequences: A039358 A039359 A039360 * A039362 A039363 A039364

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved