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 A237937 Number of (n+1)X(n+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal 0
 81, 5519, 2020033, 4202495253, 43830625875881, 2286487486628925039, 588945572180874908222729, 750899466581610572275099099051, 4734118942676314823884430739438571861 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A237945 LINKS EXAMPLE Some solutions for n=2 ..2..0..0....1..2..1....1..2..1....1..1..1....2..0..2....1..2..0....1..0..2 ..1..2..2....0..2..0....0..2..0....2..2..2....0..1..0....0..2..1....2..1..1 ..0..2..0....2..1..0....0..1..1....1..1..2....2..0..2....2..0..0....1..0..2 CROSSREFS Sequence in context: A238172 A260858 A237300 * A060349 A212706 A036354 Adjacent sequences: A237934 A237935 A237936 * A237938 A237939 A237940 KEYWORD nonn AUTHOR R. H. Hardin, Feb 16 2014 STATUS approved

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Last modified February 3 07:57 EST 2023. Contains 360024 sequences. (Running on oeis4.)