

A256573


God's number for Rubik's cube size n X n X n (quarterturn metric).


1




OFFSET

1,2


COMMENTS

"God's Number" is the maximum number of turns required to solve any scramble of cube. "Quarterturn metric" considers a 90degree turn of any side to be a single turn, while a 180degree 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 QuarterTurn Metric


CROSSREFS

Cf. A257401 (halfturn 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



