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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
OFFSET
1,1
COMMENTS
Diagonal of A237965
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 16 2014
STATUS
approved