A043415 Numbers whose base-7 representation contains exactly three 5's.

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

Links

Table of n, a(n) for n=1..37.

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

Adjacent sequences: A043412 A043413 A043414 * A043416 A043417 A043418

Keyword

nonn,base

Author

Clark Kimberling

Status

approved