A044065 - OEIS

A044065

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

4, 16, 36, 52, 64, 100, 116, 132, 144, 164, 180, 196, 208, 228, 244, 256, 356, 372, 388, 400, 420, 436, 452, 464, 484, 500, 516, 528, 548, 564, 576, 612, 628, 644, 656, 676, 692, 708, 720, 740, 756, 772, 784, 804, 820, 832, 868

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..47.

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 4], {1, 0}]>0, 1, 0], {n, 900}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 26 2017 *)

CROSSREFS

Sequence in context: A104125 A014727 A174597 * A281795 A063540 A349223

Adjacent sequences: A044062 A044063 A044064 * A044066 A044067 A044068

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved