A039006 Numbers whose base-4 representation has the same number of 2's and 3's.

0, 1, 4, 5, 11, 14, 16, 17, 20, 21, 27, 30, 35, 39, 44, 45, 50, 54, 56, 57, 64, 65, 68, 69, 75, 78, 80, 81, 84, 85, 91, 94, 99, 103, 108, 109, 114, 118, 120, 121, 131, 135, 140, 141, 147, 151, 156, 157, 175, 176, 177, 180, 181, 187, 190, 194, 198, 200, 201, 210

Offset

1,3

Links

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[0, 250], DigitCount[#, 4, 2]==DigitCount[#, 4, 3]&] (* Harvey P. Dale, Mar 19 2017 *)

Crossrefs

Cf. A007090, A160382, A160383, A039005.

Cf. A000302, A052539 (subsequences).

Sequence in context: A216562 A174009 A370980 * A191209 A262901 A287574

Adjacent sequences: A039003 A039004 A039005 * A039007 A039008 A039009

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved