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!)
A287449 Positions of 1 in A287447. 4
2, 6, 7, 10, 14, 18, 21, 23, 25, 30, 32, 34, 38, 42, 43, 46, 50, 54, 55, 59, 63, 65, 69, 70, 75, 77, 79, 82, 86, 90, 92, 96, 97, 102, 104, 106, 110, 114, 115, 118, 122, 126, 129, 131, 133, 138, 140, 142, 146, 150, 151, 154, 158, 162, 165, 167, 169, 173, 177 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(n) - a(n-1) is in {1, 2, 3, 4, 5} for n >= 1; also, 3n - a(n) is in {0, 1, 2} for n >= 1. The first 20 numbers 3n - a(n) are 1, 0, 2, 2, 1, 0, 0, 1, 2, 0, 1, 2, 1, 0, 2, 2, 1, 0, 2, 1, with 0 in positions given by A287449, 1 in positions given by A189724, and 2 in positions given by A287450.
LINKS
MATHEMATICA
s = Nest[Flatten[# /. {0->{0, 1, 2}, 1->{2, 0, 1}, 2->{1, 0, 2}}] &, {0}, 9]; (*A287447*)
Flatten[Position[s, 0]]; (*A189724*)
Flatten[Position[s, 1]]; (*A287449*)
Flatten[Position[s, 2]]; (*A287450*)
CROSSREFS
Sequence in context: A029507 A047552 A287453 * A287688 A369648 A221847
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, May 30 2017
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 March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)