A043420 Numbers whose base-7 representation contains exactly four 6's.

2400, 4801, 7202, 9603, 12004, 14405, 14748, 15091, 15434, 15777, 16120, 16463, 16512, 16561, 16610, 16659, 16708, 16757, 16764, 16771, 16778, 16785, 16792, 16799, 16800, 16801, 16802, 16803, 16804, 16805, 19207

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..2500

Mathematica

Select[Range[20000], DigitCount[#, 7, 6]==4&] (* Harvey P. Dale, Mar 27 2017 *)

Crossrefs

Cf. A007093.

Sequence in context: A108055 A286342 A204357 * A233880 A234453 A236084

Adjacent sequences: A043417 A043418 A043419 * A043421 A043422 A043423

Keyword

nonn,base

Author

Clark Kimberling

Status

approved