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A043484
Numbers having four 7's in base 9.
0
5740, 12301, 18862, 25423, 31984, 38545, 45106, 46564, 47293, 48022, 48751, 49480, 50209, 50938, 51100, 51181, 51262, 51343, 51424, 51505, 51586, 51604, 51613, 51622, 51631, 51640, 51649, 51658, 51660, 51661, 51662
OFFSET
1,1
MATHEMATICA
Select[Range[52000], DigitCount[#, 9, 7]==4&] (* Harvey P. Dale, Nov 05 2011 *)
CROSSREFS
Cf. A007095.
Sequence in context: A183647 A028547 A224726 * A163027 A069301 A218048
KEYWORD
nonn,base
STATUS
approved