A045104 Numbers whose base-4 representation contains exactly three 1's and four 2's.

5546, 5738, 5786, 5798, 5801, 6506, 6554, 6566, 6569, 6746, 6758, 6761, 6806, 6809, 6821, 9578, 9626, 9638, 9641, 9818, 9830, 9833, 9878, 9881, 9893, 10586, 10598, 10601, 10646, 10649, 10661, 10838, 10841, 10853, 10901

Offset

1,1

Links

Table of n, a(n) for n=1..35.

Mathematica

Select[Range[11000], DigitCount[#, 4, 1]==3&&DigitCount[#, 4, 2]==4&] (* Harvey P. Dale, Dec 23 2011 *)

Crossrefs

Cf. A007090.

Sequence in context: A031795 A180267 A203336 * A043512 A167281 A252907

Adjacent sequences: A045101 A045102 A045103 * A045105 A045106 A045107

Keyword

nonn,base

Author

Clark Kimberling

Status

approved