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!)
A287554 Positions of 2 in A053839. 5
3, 6, 9, 16, 18, 21, 28, 31, 33, 40, 43, 46, 52, 55, 58, 61, 66, 69, 76, 79, 81, 88, 91, 94, 100, 103, 106, 109, 115, 118, 121, 128, 129, 136, 139, 142, 148, 151, 154, 157, 163, 166, 169, 176, 178, 181, 188, 191, 196, 199, 202, 205, 211, 214, 217, 224, 226 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) - a(n-1) is in {1,2,3,4,5,6,7} for n >= 1; also, 4n - a(n) is in {0,1,2,3} for n >= 1.  The first 20 numbers 4n - a(n) are 1, 2, 3, 0, 2, 3, 0, 1, 3, 0, 1, 2, 0, 1, 2, 3, 2, 3, 0, 1, with

0 in positions given by A287555,

1 in positions given by A287552,

2 in positions given by A287553,

3 in positions given by A287554.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {0, 1, 2, 3}, 1 -> {1, 2, 3, 0}, 2 -> {2, 3, 0, 1}, 3 -> {3, 0, 1, 2}}] &, {0}, 9];  (* A053839 *)

Flatten[Position[s, 0]]; (* A287552 *)

Flatten[Position[s, 1]]; (* A287553 *)

Flatten[Position[s, 2]]; (* A287554 *)

Flatten[Position[s, 3]]; (* A287555 *)

CROSSREFS

Cf. A053839, A287552, A287553, A287555.

Sequence in context: A112773 A070885 A002597 * A308777 A057855 A198685

Adjacent sequences:  A287551 A287552 A287553 * A287555 A287556 A287557

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 31 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 4 17:50 EDT 2020. Contains 334828 sequences. (Running on oeis4.)