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A044070 Numbers n such that string 2,1 occurs in the base 4 representation of n but not of n-1. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A305755 A090333 A137190 * A348234 A226647 A147199
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified May 20 11:05 EDT 2024. Contains 372712 sequences. (Running on oeis4.)