A044987 Numbers whose base-3 representation contains exactly four 0's and two 1's.

244, 246, 252, 270, 324, 734, 736, 740, 744, 748, 750, 758, 762, 774, 784, 786, 792, 812, 816, 828, 864, 892, 894, 900, 918, 974, 978, 990, 1026, 1134, 1216, 1218, 1224, 1242, 1296, 1462, 1468, 1470, 1486, 1488, 1494, 1540

Offset

1,1

Links

Table of n, a(n) for n=1..42.

Example

244 is a term because 244_10 = 100001_3.

Mathematica

okQ[n_]:=DigitCount[n, 3, 0]==4&&DigitCount[n, 3, 1]==2; Select[Range[2000], okQ]  (* Harvey P. Dale, Jan 30 2011 *)

Crossrefs

Cf. A007089.

Sequence in context: A248137 A243774 A051002 * A201998 A234262 A031786

Adjacent sequences: A044984 A044985 A044986 * A044988 A044989 A044990

Keyword

nonn,base

Author

Clark Kimberling

Status

approved