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 A237957 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 0
 81, 1944, 81483, 7259122, 1421887147, 486414446352, 304213100538740, 404805739208682952 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A237965 LINKS EXAMPLE Some solutions for n=3 ..1..1..1..1....2..0..2..2....1..0..2..1....2..1..1..0....1..1..2..1 ..0..1..1..0....1..1..0..1....1..2..0..2....0..2..2..2....1..1..2..0 ..0..0..1..2....1..0..0..2....1..1..2..2....0..1..2..2....1..2..0..2 ..2..0..1..2....2..1..2..1....1..1..1..2....0..1..2..1....2..2..2..1 CROSSREFS Sequence in context: A225019 A224312 A224376 * A238038 A236088 A253448 Adjacent sequences:  A237954 A237955 A237956 * A237958 A237959 A237960 KEYWORD nonn AUTHOR R. H. Hardin, Feb 16 2014 STATUS approved

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Last modified August 3 19:17 EDT 2021. Contains 346441 sequences. (Running on oeis4.)