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A253544
T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal minimum nonincreasing horizontally and nondecreasing vertically
9
512, 3328, 3328, 20480, 33568, 20480, 119040, 317696, 317696, 119040, 679936, 2801200, 4414976, 2801200, 679936, 3825920, 24576256, 57759744, 57759744, 24576256, 3825920, 21426176, 212432512, 751577856, 1181976144, 751577856
OFFSET
1,1
COMMENTS
Table starts
.....512......3328......20480.......119040.........679936..........3825920
....3328.....33568.....317696......2801200.......24576256........212432512
...20480....317696....4414976.....57759744......751577856.......9765667072
..119040...2801200...57759744...1181976144....23704397056.....477165435664
..679936..24576256..751577856..23704397056...715564083200...21859274781440
.3825920.212432512.9765667072.477165435664.21859274781440.1014919309654928
LINKS
FORMULA
Empirical for column k:
k=1: a(n) = 8*a(n-1) -7*a(n-2) -56*a(n-3) +120*a(n-4) -64*a(n-5)
k=2: [order 19]
k=3: [order 21]
k=4: [order 86] for n>93
EXAMPLE
Some solutions for n=2 k=4
..0..1..0..0..0..0....0..0..0..0..0..1....0..1..0..0..0..0....0..1..1..1..0..0
..1..1..0..0..0..0....1..1..1..0..0..0....1..1..0..0..0..1....0..1..1..0..1..0
..1..0..0..1..0..0....0..1..0..1..1..1....0..0..0..1..1..0....0..0..0..0..1..1
..1..1..1..1..1..0....0..1..1..0..1..1....0..1..1..1..0..0....0..0..1..1..1..0
CROSSREFS
Sequence in context: A253863 A253856 A253871 * A253537 A254390 A253985
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 03 2015
STATUS
approved