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A140339
Half the number of n X n binary matrices differing in at most four positions between adjacent rows and at most four positions between adjacent columns.
0
1, 8, 256, 32768, 13213313, 11522939359, 14149679017875
OFFSET
1,2
CROSSREFS
Sequence in context: A024290 A253165 A140338 * A103488 A341479 A041487
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 28 2008
STATUS
approved