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 A236729 Number of (n+1)X(n+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock equal 0
 81, 2471, 203517, 55635639, 48557573047, 149399847864279, 1491726036815254275, 48504233592897621172359 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A236737 LINKS EXAMPLE Some solutions for n=2 ..0..0..0....1..2..0....1..0..2....1..2..1....0..1..1....0..0..0....2..2..1 ..1..0..2....0..1..1....0..1..2....0..2..1....2..2..2....2..1..1....1..0..2 ..2..1..1....1..1..0....2..0..2....2..1..2....0..1..1....1..2..2....0..1..0 CROSSREFS Sequence in context: A123219 A205512 A297606 * A236147 A237473 A282995 Adjacent sequences:  A236726 A236727 A236728 * A236730 A236731 A236732 KEYWORD nonn AUTHOR R. H. Hardin, Jan 30 2014 STATUS approved

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Last modified September 25 15:31 EDT 2020. Contains 337344 sequences. (Running on oeis4.)