A039374 Numbers whose base-9 representation has the same nonzero number of 2's and 5's.

23, 47, 104, 128, 167, 176, 194, 203, 207, 208, 210, 211, 213, 214, 215, 221, 230, 239, 266, 290, 347, 371, 407, 416, 423, 424, 426, 427, 429, 430, 431, 434, 443, 461, 470, 479, 509, 533, 590, 614, 671, 695, 752, 776, 833, 857, 896, 905, 923, 932, 936, 937

Offset

1,1

Links

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

Mathematica

Select[Range[1000], DigitCount[#, 9, 2]==DigitCount[#, 9, 5]>0&] (* Harvey P. Dale, Dec 16 2019 *)

Prog

(MATLAB) x = 0:937; d = dec2base(x, 9)-'0'; s1 = sum(d==2, 2); s2 = sum(d==5, 2); a = x(s1==s2 & s1>0); disp(regexprep(num2str(a), ' +', ', ')) % Chris R. Rehmann, Apr 08 2026

Crossrefs

Cf. A007095, A039093.

Cf. A039372, A039373, A039375, A039376, A039377.

Cf. A039361, A039368, A039379, A039383.

Sequence in context: A054821 A195058 A352291 * A043197 A043977 A373464

Adjacent sequences: A039371 A039372 A039373 * A039375 A039376 A039377

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved