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A039320
Numbers whose base-7 representation has the same nonzero number of 2's and 4's.
0
18, 30, 67, 79, 102, 109, 123, 126, 127, 129, 131, 132, 137, 144, 165, 177, 198, 205, 210, 211, 213, 215, 216, 219, 233, 240, 263, 275, 312, 324, 361, 373, 410, 422, 445, 452, 466, 469, 470, 472, 474, 475, 480, 487, 508, 520, 541, 548, 553, 554, 556, 558
OFFSET
1,1
MATHEMATICA
Select[Range[600], DigitCount[#, 7, 2]==DigitCount[#, 7, 4]>0&] (* Harvey P. Dale, Nov 20 2016 *)
CROSSREFS
Cf. A007093.
Sequence in context: A092357 A141115 A373844 * A043143 A043923 A160916
KEYWORD
nonn,base,easy
STATUS
approved