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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A227751 LINKS 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: A053598 A193550 A102585 * A078702 A259795 A069569 Adjacent sequences:  A227743 A227744 A227745 * A227747 A227748 A227749 KEYWORD nonn AUTHOR R. H. Hardin Jul 25 2013 STATUS approved

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Last modified May 13 02:36 EDT 2021. Contains 343836 sequences. (Running on oeis4.)