A039427 Numbers whose base-10 representation has the same nonzero number of 4's and 9's.

49, 94, 149, 194, 249, 294, 349, 394, 409, 419, 429, 439, 459, 469, 479, 489, 490, 491, 492, 493, 495, 496, 497, 498, 549, 594, 649, 694, 749, 794, 849, 894, 904, 914, 924, 934, 940, 941, 942, 943, 945, 946, 947, 948, 954, 964, 974, 984, 1049, 1094

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Mathematica

Select[Range[1100], DigitCount[#, 10, 4]==DigitCount[#, 10, 9]>0&] (* Harvey P. Dale, Oct 23 2017 *)

Crossrefs

Sequence in context: A260469 A275419 A031180 * A043250 A044030 A165339

Adjacent sequences: A039424 A039425 A039426 * A039428 A039429 A039430

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved