login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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

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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 28 13:09 EDT 2021. Contains 348329 sequences. (Running on oeis4.)