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A227746
Number of n X n 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(n+1) binary array having determinant equal to one
0
2, 13, 210, 10092, 1378923, 536234494, 593219255593, 1866485946679255, 16707964949615383863, 425495289603079437453771, 30826893520750966059187346452
OFFSET
1,1
COMMENTS
Diagonal of A227751
EXAMPLE
Some solutions for n=4
..1..0..0..1....1..0..0..1....1..0..1..0....0..1..0..1....0..0..1..0
..0..0..0..1....0..0..0..0....0..0..0..0....0..0..1..0....1..0..1..0
..1..0..0..0....0..0..0..0....1..0..1..0....0..0..1..0....1..1..0..1
..1..1..0..1....0..0..1..0....0..1..0..1....0..1..0..0....0..0..0..0
CROSSREFS
Sequence in context: A367830 A102585 A367828 * A078702 A381985 A259795
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 25 2013
STATUS
approved