A043416 Numbers whose base-7 representation contains exactly four 5's.

2000, 4401, 6802, 9203, 11604, 12290, 12633, 12976, 13319, 13662, 13760, 13809, 13858, 13907, 13956, 13970, 13977, 13984, 13991, 13998, 14000, 14001, 14002, 14003, 14004, 14006, 14012, 14054, 14348, 16406, 18807

Offset

1,1

Links

Table of n, a(n) for n=1..31.

Mathematica

Select[Range[20000], DigitCount[#, 7, 5]==4&] (* Harvey P. Dale, May 16 2019 *)

Crossrefs

Cf. A007093.

Sequence in context: A037029 A048517 A048518 * A125680 A162238 A162239

Adjacent sequences: A043413 A043414 A043415 * A043417 A043418 A043419

Keyword

nonn,base

Author

Clark Kimberling

Status

approved