A045102 Numbers whose base-4 representation contains exactly three 1's and two 2's.

346, 358, 361, 406, 409, 421, 598, 601, 613, 661, 1114, 1126, 1129, 1174, 1177, 1189, 1306, 1318, 1321, 1354, 1378, 1384, 1387, 1390, 1402, 1414, 1417, 1426, 1432, 1435, 1438, 1441, 1444, 1447, 1453, 1462, 1465, 1498

Offset

1,1

Links

Table of n, a(n) for n=1..38.

Mathematica

Select[Range[1500], DigitCount[#, 4, 1]==3&&DigitCount[#, 4, 2]==2&] (* Harvey P. Dale, May 15 2017 *)

Crossrefs

Cf. A007090.

Sequence in context: A048904 A139266 A063536 * A225934 A287700 A281163

Adjacent sequences: A045099 A045100 A045101 * A045103 A045104 A045105

Keyword

nonn,base

Author

Clark Kimberling

Status

approved