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A237325
Number of (n+1)X(1+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
81, 320, 1264, 5120, 20692, 82800, 332192, 1346016, 5439936, 21769152, 87340224, 353899264, 1430292992, 5723670528, 22964038912, 93049464832, 376061938688, 1504905191424, 6037857292288, 24465182810112, 98876703129600
OFFSET
1,1
COMMENTS
Column 1 of A237332
LINKS
FORMULA
Empirical: a(n) = 288*a(n-4) -6720*a(n-8) +33536*a(n-12) for n>15
EXAMPLE
Some solutions for n=5
..2..1....1..2....0..1....1..2....2..2....1..2....2..1....2..0....0..0....1..1
..2..0....1..1....2..0....0..0....2..2....2..0....1..2....0..2....1..2....2..2
..2..0....0..2....2..0....2..0....1..2....0..2....1..1....1..2....1..2....2..1
..2..1....1..0....0..1....1..0....1..0....0..1....0..2....1..2....1..1....1..0
..0..1....1..2....2..1....1..2....2..2....0..1....1..0....2..0....1..1....1..1
..2..2....0..2....2..2....2..0....1..1....1..1....1..2....0..2....2..1....1..1
CROSSREFS
Sequence in context: A237567 A237560 A237332 * A158776 A101963 A053171
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 06 2014
STATUS
approved