A039404 Numbers whose base-10 representation has the same nonzero number of 1's and 4's.

14, 41, 104, 124, 134, 140, 142, 143, 145, 146, 147, 148, 149, 154, 164, 174, 184, 194, 214, 241, 314, 341, 401, 410, 412, 413, 415, 416, 417, 418, 419, 421, 431, 451, 461, 471, 481, 491, 514, 541, 614, 641, 714, 741, 814, 841, 914, 941, 1004, 1024

Offset

1,1

Links

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

Mathematica

Select[Range[1100], DigitCount[#, 10, 1]==DigitCount[#, 10, 4]>0&] (* Harvey P. Dale, Jun 09 2016 *)

Crossrefs

Sequence in context: A105869 A216298 A056034 * A043227 A044007 A366480

Adjacent sequences: A039401 A039402 A039403 * A039405 A039406 A039407

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved