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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

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Last modified February 27 10:25 EST 2021. Contains 341649 sequences. (Running on oeis4.)