A044986 Numbers whose base-3 representation contains exactly four 0's and one 1.

81, 245, 249, 261, 297, 405, 487, 489, 495, 513, 567, 737, 749, 753, 785, 789, 801, 893, 897, 909, 945, 1217, 1221, 1233, 1269, 1377, 1463, 1465, 1469, 1473, 1477, 1479, 1487, 1491, 1503, 1513, 1515, 1521, 1541, 1545, 1557

Offset

1,1

Links

Table of n, a(n) for n=1..41.

Mathematica

Select[Range[1600], DigitCount[#, 3, 0]==4&&DigitCount[#, 3, 1]==1&] (* Harvey P. Dale, Mar 30 2018 *)

Crossrefs

Cf. A007089.

Sequence in context: A045009 A237167 A236893 * A237160 A236886 A206142

Adjacent sequences: A044983 A044984 A044985 * A044987 A044988 A044989

Keyword

nonn,base

Author

Clark Kimberling

Status

approved