A044454 Numbers n such that string 3,0 occurs in the base 4 representation of n but not of n+1.

12, 28, 44, 51, 60, 76, 92, 108, 115, 124, 140, 156, 172, 179, 188, 207, 220, 236, 243, 252, 268, 284, 300, 307, 316, 332, 348, 364, 371, 380, 396, 412, 428, 435, 444, 463, 476, 492, 499, 508, 524, 540, 556, 563, 572, 588, 604

Offset

1,1

Links

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

Mathematica

Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 4], {3, 0}]>0, 1, 0], {n, 700}], {1, 0}]][[1]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, Mar 24 2016 *)

Crossrefs

Sequence in context: A108405 A184838 A044073 * A098502 A158953 A223454

Adjacent sequences: A044451 A044452 A044453 * A044455 A044456 A044457

Keyword

nonn,base

Author

Clark Kimberling

Status

approved