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A039436 Numbers whose base-10 representation has the same nonzero number of 7's and 9's. 1
79, 97, 179, 197, 279, 297, 379, 397, 479, 497, 579, 597, 679, 697, 709, 719, 729, 739, 749, 759, 769, 789, 790, 791, 792, 793, 794, 795, 796, 798, 879, 897, 907, 917, 927, 937, 947, 957, 967, 970, 971, 972, 973, 974, 975, 976, 978, 987, 1079, 1097 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[1100], DigitCount[#, 10, 7]==DigitCount[#, 10, 9]>0&] (* Harvey P. Dale, Aug 30 2020 *)
CROSSREFS
Sequence in context: A091819 A318158 A117244 * A043259 A044039 A065211
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved

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Last modified March 18 21:02 EDT 2024. Contains 370951 sequences. (Running on oeis4.)