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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A113246 a(2^n+a) = a(2^(n-1)+a) [if 0 <= a < 2^(n-1)], 3^n-a(2^n-a) [if 2^(n-1) <= a < 2^n]. 0
1, 1, 2, 1, 2, 7, 8, 1, 2, 7, 8, 19, 20, 25, 26, 1, 2, 7, 8, 19, 20, 25, 26, 55, 56, 61, 62, 73, 74, 79, 80, 1, 2, 7, 8, 19, 20, 25, 26, 55, 56, 61, 62, 73, 74, 79, 80, 163, 164, 169, 170, 181, 182, 187, 188, 217, 218, 223, 224, 235, 236, 241, 242 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Cantor tree of endpoints. Row #R (with 2^R values), divided by 3^R, gives some endpoints of the Cantor set.

LINKS

Table of n, a(n) for n=1..63.

PlanetMath, Cantor Set

EXAMPLE

1

1,2

1,2,7,8

1,2,7,8,19,20,25,26

CROSSREFS

Sequence in context: A167480 A241738 A021051 * A192266 A056887 A144803

Adjacent sequences:  A113243 A113244 A113245 * A113247 A113248 A113249

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Jan 07 2006

EXTENSIONS

Edited by N. J. A. Sloane, Jan 26 2006

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 December 7 20:13 EST 2021. Contains 349585 sequences. (Running on oeis4.)