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A039154
Numbers whose base-10 representation has the same number of 7's and 9's.
0
0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 14, 15, 16, 18, 20, 21, 22, 23, 24, 25, 26, 28, 30, 31, 32, 33, 34, 35, 36, 38, 40, 41, 42, 43, 44, 45, 46, 48, 50, 51, 52, 53, 54, 55, 56, 58, 60, 61, 62, 63, 64, 65, 66, 68, 79, 80, 81, 82, 83, 84, 85, 86, 88, 97, 100, 101, 102
OFFSET
1,3
MATHEMATICA
Select[Range[0, 150], DigitCount[#, 10, 7]==DigitCount[#, 10, 9]&] (* Harvey P. Dale, Jun 24 2021 *)
CROSSREFS
Sequence in context: A270193 A039266 A039205 * A039083 A178596 A034047
KEYWORD
nonn,base,easy
STATUS
approved