A044450 Numbers k such that string 2,0 occurs in the base 4 representation of k but not of k+1.

8, 24, 35, 40, 56, 72, 88, 99, 104, 120, 143, 152, 163, 168, 184, 200, 216, 227, 232, 248, 264, 280, 291, 296, 312, 328, 344, 355, 360, 376, 399, 408, 419, 424, 440, 456, 472, 483, 488, 504, 575, 584, 600, 611, 616, 632, 655, 664

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 4], {2, 0}]>0, 1, 0], {n, 700}], {1, 0}][[;; , 1]] (* Harvey P. Dale, Aug 26 2025 *)

Crossrefs

Sequence in context: A140403 A108578 A305241 * A134223 A304475 A316300

Adjacent sequences: A044447 A044448 A044449 * A044451 A044452 A044453

Keyword

nonn,base

Author

Clark Kimberling

Status

approved