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].

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

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 * A358604 A192266 A056887

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