A044452 Numbers n such that string 2,2 occurs in the base 4 representation of n but not of n+1.

10, 26, 43, 58, 74, 90, 107, 122, 138, 154, 175, 186, 202, 218, 235, 250, 266, 282, 299, 314, 330, 346, 363, 378, 394, 410, 431, 442, 458, 474, 491, 506, 522, 538, 555, 570, 586, 602, 619, 634, 703, 714, 730, 747, 762, 778, 794, 811, 826, 842, 858, 875, 890

Offset

1,1

Links

Table of n, a(n) for n=1..53.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 4], {2, 2}]>0, 1, 0], {n, 1200}], {1, 0}][[All, 1]](* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Nov 19 2019 *)

Crossrefs

Sequence in context: A113770 A223451 A229309 * A299409 A198017 A137351

Adjacent sequences: A044449 A044450 A044451 * A044453 A044454 A044455

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Harvey P. Dale, Nov 19 2019

Status

approved