A043410 Numbers whose base-7 representation contains exactly two 4's.

32, 81, 130, 179, 200, 207, 214, 221, 224, 225, 226, 227, 229, 230, 235, 242, 277, 326, 375, 424, 473, 522, 543, 550, 557, 564, 567, 568, 569, 570, 572, 573, 578, 585, 620, 669, 718, 767, 816, 865, 886, 893, 900, 907, 910, 911

Offset

1,1

Links

Table of n, a(n) for n=1..46.

Mathematica

Select[Range[1000], DigitCount[#, 7, 4]==2&] (* Harvey P. Dale, Jul 19 2015 *)

Crossrefs

Cf. A007093.

Sequence in context: A234133 A203447 A340701 * A044170 A044551 A256810

Adjacent sequences: A043407 A043408 A043409 * A043411 A043412 A043413

Keyword

nonn,base

Author

Clark Kimberling

Status

approved