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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.
CROSSREFS
Cf. A257401 (half-turn metric), A054434 (possible positions), A075152 (possible permutations).
Sequence in context: A079505 A039604 A199405 * A030786 A094163 A134837
KEYWORD
nonn,hard,more,bref
AUTHOR
Peter Woodward, Apr 22 2015
STATUS
approved