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A045126
Numbers whose base-4 representation contains exactly three 1's and two 3's.
0
351, 375, 381, 471, 477, 501, 855, 861, 885, 981, 1119, 1143, 1149, 1239, 1245, 1269, 1311, 1335, 1341, 1359, 1391, 1395, 1403, 1404, 1406, 1439, 1463, 1469, 1479, 1485, 1491, 1499, 1500, 1502, 1511, 1517, 1521, 1524
OFFSET
1,1
MATHEMATICA
Select[Range[1600], DigitCount[#, 4, 1]==3&&DigitCount[#, 4, 3]==2&] (* Harvey P. Dale, Jun 20 2017 *)
CROSSREFS
Cf. A007090.
Sequence in context: A084875 A364508 A074203 * A025385 A261640 A292990
KEYWORD
nonn,base
STATUS
approved