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A237235
Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock equal
1
256, 1280, 6976, 40064, 234752, 1395200, 8344576, 50202624, 302927872, 1834229760, 11124686848, 67635806208, 411596816384, 2509448019968, 15307122147328, 93512310194176, 571374872559616, 3495701365391360
OFFSET
1,1
COMMENTS
Column 1 of A237241
LINKS
FORMULA
Empirical: a(n) = 14*a(n-1) -784*a(n-3) +2736*a(n-4) +10208*a(n-5) -59776*a(n-6) -17408*a(n-7) +443392*a(n-8) -342016*a(n-9) -1089536*a(n-10) +1376256*a(n-11)
EXAMPLE
Some solutions for n=4
..1..1....3..1....1..0....1..0....1..0....2..0....2..3....2..3....2..3....3..3
..1..0....2..1....0..0....1..1....3..2....3..1....3..2....2..1....3..1....0..0
..3..3....1..3....1..2....2..1....2..1....0..2....2..3....1..0....2..1....2..2
..2..3....2..3....3..1....2..2....2..3....3..1....2..3....1..2....1..3....1..1
..3..3....2..2....2..1....3..2....3..0....3..3....2..3....1..0....1..2....0..0
CROSSREFS
Sequence in context: A237241 A120054 A237952 * A129539 A113877 A237398
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 05 2014
STATUS
approved