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A039311
Numbers whose base-7 representation has the same nonzero number of 0's and 4's.
0
28, 53, 77, 102, 126, 151, 175, 197, 198, 199, 201, 202, 203, 210, 217, 231, 238, 249, 273, 298, 322, 354, 361, 368, 372, 373, 374, 376, 377, 382, 389, 396, 420, 445, 469, 494, 518, 540, 541, 542, 544, 545, 546, 553, 560, 574, 581, 592, 616, 641, 665, 697
OFFSET
1,1
MATHEMATICA
Select[Range[700], DigitCount[#, 7, 0]==DigitCount[#, 7, 4]>0&] (* Harvey P. Dale, Jul 25 2016 *)
CROSSREFS
Cf. A007093.
Sequence in context: A216303 A261105 A043134 * A043914 A044080 A044461
KEYWORD
nonn,base,easy
STATUS
approved