A045088 Numbers whose base-4 representation contains no 1's and exactly three 2's.

42, 138, 162, 168, 171, 174, 186, 234, 522, 546, 552, 555, 558, 570, 642, 648, 651, 654, 672, 675, 684, 687, 690, 696, 699, 702, 714, 738, 744, 747, 750, 762, 810, 906, 930, 936, 939, 942, 954, 1002, 2058, 2082, 2088, 2091, 2094

Offset

1,1

Links

Table of n, a(n) for n=1..45.

Mathematica

Select[Range[2200], DigitCount[#, 4, 1]==0&&DigitCount[#, 4, 2]==3&] (* Harvey P. Dale, Dec 05 2012 *)

Crossrefs

Cf. A007090.

Sequence in context: A304613 A005557 A244102 * A303860 A002759 A346856

Adjacent sequences: A045085 A045086 A045087 * A045089 A045090 A045091

Keyword

nonn,base

Author

Clark Kimberling

Status

approved