A044977 Numbers whose base-3 representation contains exactly two 0's and two 1's.

28, 30, 36, 86, 88, 92, 96, 100, 102, 110, 114, 126, 136, 138, 144, 166, 172, 174, 190, 192, 198, 260, 266, 268, 278, 290, 294, 302, 304, 308, 312, 316, 318, 332, 344, 348, 380, 384, 396, 410, 412, 416, 420, 424, 426, 434, 438

Offset

1,1

Links

Table of n, a(n) for n=1..47.

Mathematica

Select[Range[500], DigitCount[#, 3, 0]==DigitCount[#, 3, 1]==2&] (* Harvey P. Dale, Jun 23 2013 *)

Crossrefs

Cf. A007089.

Sequence in context: A042620 A042621 A042622 * A046466 A374008 A054396

Adjacent sequences: A044974 A044975 A044976 * A044978 A044979 A044980

Keyword

nonn,base

Author

Clark Kimberling

Status

approved