|
| |
|
|
A256573
|
|
God's number for Rubik's cube size n X n X n (quarter-turn metric).
|
|
1
|
| |
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
"God's Number" is the maximum number of turns required to solve any scramble of cube. "Quarter-turn metric" considers a 90-degree turn of any side to be a single turn, while a 180-degree turn is considered two turns. Cubes of larger size than 3 X 3 X 3 are not solved for God's number.
|
|
|
LINKS
|
Table of n, a(n) for n=1..3.
Jerry Bryan, God's Algorithm for the 2x2x2 Pocket Cube
Tomas Rokicki, Morley Davidson, God's Number is 26 in the Quarter-Turn Metric
|
|
|
CROSSREFS
|
Cf. A257401 (half-turn metric), A054434 (possible positions), A075152 (possible permutations).
Sequence in context: A079505 A039604 A199405 * A030786 A094163 A134837
Adjacent sequences: A256570 A256571 A256572 * A256574 A256575 A256576
|
|
|
KEYWORD
|
nonn,hard,more,bref
|
|
|
AUTHOR
|
Peter Woodward, Apr 22 2015
|
|
|
STATUS
|
approved
|
| |
|
|
