A043406 Numbers whose base-7 representation contains exactly two 3's.

24, 73, 122, 150, 157, 164, 168, 169, 170, 172, 173, 174, 178, 185, 192, 220, 269, 318, 367, 416, 465, 493, 500, 507, 511, 512, 513, 515, 516, 517, 521, 528, 535, 563, 612, 661, 710, 759, 808, 836, 843, 850, 854, 855, 856, 858

Offset

1,1

Links

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

Mathematica

Select[Range[1000], DigitCount[#, 7, 3]==2&]  (* Harvey P. Dale, Mar 28 2011 *)

Crossrefs

Cf. A007093.

Sequence in context: A329077 A339883 A042128 * A044162 A044543 A161587

Adjacent sequences: A043403 A043404 A043405 * A043407 A043408 A043409

Keyword

nonn,base

Author

Clark Kimberling

Status

approved