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A039404
Numbers whose base-10 representation has the same nonzero number of 1's and 4's.
0
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
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
KEYWORD
nonn,base,easy
STATUS
approved