A045129 Numbers whose base-4 representation contains exactly four 1's and no 3's.

85, 277, 325, 337, 340, 342, 345, 357, 405, 597, 1045, 1093, 1105, 1108, 1110, 1113, 1125, 1173, 1285, 1297, 1300, 1302, 1305, 1317, 1345, 1348, 1350, 1353, 1360, 1362, 1368, 1370, 1377, 1380, 1382, 1385, 1413, 1425, 1428

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Mathematica

Select[Range[1500], DigitCount[#, 4, 1]==4&&DigitCount[#, 4, 3]==0&] (* Harvey P. Dale, May 06 2011 *)

Crossrefs

Cf. A007090.

Sequence in context: A211257 A027524 A043340 * A045105 A038472 A020200

Adjacent sequences: A045126 A045127 A045128 * A045130 A045131 A045132

Keyword

nonn,base

Author

Clark Kimberling

Status

approved