login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A043384 Numbers having four 3's in base 6. 1
777, 2073, 3369, 4017, 4233, 4449, 4557, 4593, 4629, 4647, 4653, 4659, 4662, 4663, 4664, 4666, 4667, 4671, 4677, 4701, 4737, 4881, 5097, 5961, 7257, 8553, 9849, 11145, 11793, 12009, 12225, 12333, 12369, 12405, 12423, 12429 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

k is in the sequence iff either k == 3 (mod 6) and floor(k/6) is in A043383, or k !== 3 (mod 6) and floor(k/6) is in the sequence. - Robert Israel, Jul 24 2018

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

filter:= n -> numboccur(3, convert(n, base, 6))=4:

select(filter, [$1..20000]); # Robert Israel, Jul 24 2018

CROSSREFS

Cf. A007092.

Sequence in context: A202893 A204300 A043519 * A237162 A252529 A008746

Adjacent sequences: A043381 A043382 A043383 * A043385 A043386 A043387

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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 8 23:03 EST 2023. Contains 360153 sequences. (Running on oeis4.)