OFFSET
0,2
REFERENCES
See A087725.
LINKS
EXAMPLE
Starting with
1-2
345
678
the two final configurations requiring 31 moves are
86- ... -86
547 and 743
231 ... 251
MAPLE
See link in A089473.
PROG
(Python) # alst(), moves(), swap() in A089473
print(alst("1-2345678", (3, 3))) # Michael S. Branicky, Dec 30 2020
CROSSREFS
KEYWORD
fini,full,nonn
AUTHOR
Hugo Pfoertner, Nov 19 2003
STATUS
approved