A045001 Numbers whose base-3 representation contains exactly two 0's and two 2's.

56, 60, 72, 89, 101, 105, 137, 141, 153, 167, 169, 173, 177, 181, 183, 191, 195, 207, 217, 219, 225, 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

Offset

1,1

Links

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

Mathematica

Select[Range[500], DigitCount[#, 3, 0]==DigitCount[#, 3, 2]==2&] (* Harvey P. Dale, Mar 10 2017 *)

Crossrefs

Cf. A007089.

Sequence in context: A174460 A345494 A345495 * A116660 A047727 A069810

Adjacent sequences: A044998 A044999 A045000 * A045002 A045003 A045004

Keyword

nonn,base

Author

Clark Kimberling

Status

approved