login
A043415
Numbers whose base-7 representation contains exactly three 5's.
0
285, 628, 971, 1314, 1657, 1755, 1804, 1853, 1902, 1951, 1965, 1972, 1979, 1986, 1993, 1995, 1996, 1997, 1998, 1999, 2001, 2007, 2049, 2343, 2686, 3029, 3372, 3715, 4058, 4156, 4205, 4254, 4303, 4352, 4366, 4373, 4380
OFFSET
1,1
MATHEMATICA
Select[Range[5000], DigitCount[#, 7, 5]==3&] (* Harvey P. Dale, Apr 06 2015 *)
CROSSREFS
Cf. A007093.
Sequence in context: A093228 A339681 A249954 * A288037 A105921 A209311
KEYWORD
nonn,base
STATUS
approved