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A044451 Numbers n such that string 2,1 occurs in the base 4 representation of n but not of n+1. 0
9, 25, 39, 41, 57, 73, 89, 103, 105, 121, 137, 159, 167, 169, 185, 201, 217, 231, 233, 249, 265, 281, 295, 297, 313, 329, 345, 359, 361, 377, 393, 415, 423, 425, 441, 457, 473, 487, 489, 505, 521, 537, 551, 553, 569, 639, 649 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

CROSSREFS

Sequence in context: A147199 A147403 A241764 * A114057 A227518 A031036

Adjacent sequences:  A044448 A044449 A044450 * A044452 A044453 A044454

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified April 19 06:59 EDT 2019. Contains 322237 sequences. (Running on oeis4.)