A044069 Numbers n such that string 2,0 occurs in the base 4 representation of n but not of n-1.

8, 24, 32, 40, 56, 72, 88, 96, 104, 120, 128, 152, 160, 168, 184, 200, 216, 224, 232, 248, 264, 280, 288, 296, 312, 328, 344, 352, 360, 376, 384, 408, 416, 424, 440, 456, 472, 480, 488, 504, 512, 584, 600, 608, 616, 632, 640, 664

Offset

1,1

Links

Table of n, a(n) for n=1..48.

Mathematica

Select[Range[700], MemberQ[Partition[IntegerDigits[#, 4], 2, 1], {2, 0}] && !MemberQ[Partition[IntegerDigits[#-1, 4], 2, 1], {2, 0}]&] (* Harvey P. Dale, Jun 14 2013 *)

Crossrefs

Sequence in context: A340930 A269420 A056196 * A028628 A333427 A128690

Adjacent sequences: A044066 A044067 A044068 * A044070 A044071 A044072

Keyword

nonn,base

Author

Clark Kimberling

Status

approved