A044070 Numbers n such that string 2,1 occurs in the base 4 representation of n but not of n-1.

9, 25, 36, 41, 57, 73, 89, 100, 105, 121, 137, 144, 164, 169, 185, 201, 217, 228, 233, 249, 265, 281, 292, 297, 313, 329, 345, 356, 361, 377, 393, 400, 420, 425, 441, 457, 473, 484, 489, 505, 521, 537, 548, 553, 569, 576, 649

Offset

1,1

Links

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

Crossrefs

Sequence in context: A305755 A090333 A137190 * A348234 A226647 A147199

Adjacent sequences: A044067 A044068 A044069 * A044071 A044072 A044073

Keyword

nonn,base

Author

Clark Kimberling

Status

approved