A045149 Numbers whose base-4 representation contains exactly three 2's and one 3.

171, 174, 186, 234, 427, 430, 442, 490, 555, 558, 570, 619, 622, 634, 651, 654, 667, 670, 675, 679, 684, 685, 690, 694, 696, 697, 714, 730, 738, 742, 744, 745, 810, 874, 906, 922, 930, 934, 936, 937, 1195, 1198, 1210, 1258

Offset

1,1

Links

Table of n, a(n) for n=1..44.

Mathematica

Select[Range[1300], DigitCount[#, 4, 2]==3&&DigitCount[#, 4, 3]==1&] (* Harvey P. Dale, Sep 01 2017 *)

Crossrefs

Cf. A007090.

Sequence in context: A185614 A187140 A185845 * A031511 A101273 A136365

Adjacent sequences: A045146 A045147 A045148 * A045150 A045151 A045152

Keyword

nonn,base

Author

Clark Kimberling

Status

approved