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A039407 Numbers whose base-10 representation has the same nonzero number of 1's and 7's. 0
17, 71, 107, 127, 137, 147, 157, 167, 170, 172, 173, 174, 175, 176, 178, 179, 187, 197, 217, 271, 317, 371, 417, 471, 517, 571, 617, 671, 701, 710, 712, 713, 714, 715, 716, 718, 719, 721, 731, 741, 751, 761, 781, 791, 817, 871, 917, 971, 1007, 1027 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[1200], DigitCount[#, 10, 1]==DigitCount[#, 10, 7]>0&] (* Harvey P. Dale, Jun 10 2023 *)
CROSSREFS
Sequence in context: A179038 A179039 A152295 * A043230 A044010 A106921
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved

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Last modified August 31 05:08 EDT 2024. Contains 375550 sequences. (Running on oeis4.)