

A237327


Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one


1



1264, 8588, 58296, 414268, 2870224, 19874388, 137663582, 978134492, 6780688008, 46959680920, 325344257654, 2311691261008, 16025622824382, 110986965737552, 768943917811452, 5463623395524888, 37876242151447786, 262316002867523352
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OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

Some solutions for n=3
..2..1..1..1....0..2..1..1....1..2..2..0....2..0..2..1....2..0..1..1
..1..2..1..1....0..2..2..2....1..2..1..1....1..2..2..0....2..2..2..0
..2..0..1..2....1..2..2..1....0..2..1..2....2..1..2..0....2..1..1..2
..0..2..0..1....0..1..2..1....1..1..1..2....0..2..1..2....1..0..1..2


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



