A045017 Numbers whose base-4 representation contains no 0's and exactly four 1's.

85, 342, 343, 345, 349, 357, 373, 405, 469, 597, 853, 1370, 1371, 1374, 1375, 1382, 1383, 1385, 1389, 1398, 1399, 1401, 1405, 1430, 1431, 1433, 1437, 1445, 1461, 1494, 1495, 1497, 1501, 1509, 1525, 1622, 1623, 1625, 1629

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..2700

Mathematica

Select[Range[10000], DigitCount[#, 4, 0] == 0 && DigitCount[#, 4, 1] == 4 &] (* Vincenzo Librandi, Sep 21 2016 *)

Crossrefs

Cf. A007090.

Sequence in context: A183652 A183644 A068559 * A297399 A020212 A251343

Adjacent sequences: A045014 A045015 A045016 * A045018 A045019 A045020

Keyword

nonn,base

Author

Clark Kimberling

Status

approved