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 A187453 Number of (n+1)X(n+1) 0..1 arrays with the array of 2X2 subblock determinants symmetric 0
 16, 264, 10776, 1011136, 229028648, 121525356464, 153323988561520, 455805504397977992, 3209063463825423259232, 53344074954377463462263136, 2097212449015058409197692938608 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A187457 LINKS EXAMPLE Some solutions for 4X4 ..0..0..1..1....1..0..1..0....0..1..1..0....1..0..1..1....1..1..1..1 ..1..0..1..1....0..0..1..1....0..1..0..0....1..0..0..1....0..0..0..0 ..0..0..1..0....1..0..1..0....1..0..1..0....1..0..1..0....0..0..0..1 ..1..1..0..1....0..1..0..0....0..0..1..0....0..1..0..0....0..0..1..0 CROSSREFS Sequence in context: A068770 A113359 A236516 * A333903 A218062 A220757 Adjacent sequences:  A187450 A187451 A187452 * A187454 A187455 A187456 KEYWORD nonn AUTHOR R. H. Hardin Mar 10 2011 STATUS approved

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Last modified December 7 22:50 EST 2021. Contains 349590 sequences. (Running on oeis4.)