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 A253812 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally and vertically 0
 512, 12992, 214596, 1713952, 20991976, 250052478, 1124641848, 5696013500, 59724420234, 668675350006, 2474515112828 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A253820 LINKS EXAMPLE Some solutions for n=2 ..0..0..1..1....1..0..1..0....1..0..0..1....0..1..1..1....0..1..1..0 ..1..1..1..0....0..0..0..0....1..0..1..0....0..1..1..1....0..1..0..0 ..1..0..0..1....0..1..0..1....1..1..0..1....1..1..1..0....0..0..1..0 ..0..1..1..1....0..0..0..1....1..0..0..1....0..0..1..0....1..0..1..1 CROSSREFS Sequence in context: A254475 A254768 A254504 * A256947 A254720 A254252 Adjacent sequences: A253809 A253810 A253811 * A253813 A253814 A253815 KEYWORD nonn AUTHOR R. H. Hardin, Jan 14 2015 STATUS approved

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Last modified March 25 23:47 EDT 2023. Contains 361529 sequences. (Running on oeis4.)