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A251137 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements 9
40, 133, 133, 369, 416, 369, 919, 1002, 1002, 919, 2129, 2264, 1997, 2264, 2129, 4699, 4786, 4110, 4110, 4786, 4699, 10033, 9786, 8050, 8008, 8050, 9786, 10033, 20947, 19548, 15830, 14753, 14753, 15830, 19548, 20947, 43077, 38674, 30770, 27738, 25597 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
....40....133....369....919...2129...4699...10033...20947...43077...87703
...133....416...1002...2264...4786...9786...19548...38674...76196..150192
...369...1002...1997...4110...8050..15830...30770...60088..117492..230956
...919...2264...4110...8008..14753..27738...51679...97758..186223..359276
..2129...4786...8050..14753..25597..46023...82431..151567..282371..536601
..4699...9786..15830..27738..46023..79226..135959..240780..434193..804400
.10033..19548..30770..51679..82431.135959..223663..380641..662361.1191797
.20947..38674..60088..97758.151567.240780..380641..620524.1035365.1793398
.43077..76196.117492.186223.282371.434193..662361.1035365.1653313.2742539
.87703.150192.230956.359276.536601.804400.1191797.1793398.2742539.4340190
LINKS
FORMULA
Empirical for column k:
k=1: a(n) = 5*a(n-1) -8*a(n-2) +2*a(n-3) +7*a(n-4) -7*a(n-5) +2*a(n-6)
k=2: a(n) = 6*a(n-1) -13*a(n-2) +10*a(n-3) +5*a(n-4) -14*a(n-5) +9*a(n-6) -2*a(n-7) for n>9
k=3: a(n) = 6*a(n-1) -13*a(n-2) +10*a(n-3) +5*a(n-4) -14*a(n-5) +9*a(n-6) -2*a(n-7) for n>10
k=4: a(n) = 6*a(n-1) -13*a(n-2) +10*a(n-3) +5*a(n-4) -14*a(n-5) +9*a(n-6) -2*a(n-7) for n>10
k=5: a(n) = 6*a(n-1) -13*a(n-2) +10*a(n-3) +5*a(n-4) -14*a(n-5) +9*a(n-6) -2*a(n-7) for n>10
k=6: a(n) = 6*a(n-1) -13*a(n-2) +10*a(n-3) +5*a(n-4) -14*a(n-5) +9*a(n-6) -2*a(n-7) for n>10
k=7: a(n) = 6*a(n-1) -13*a(n-2) +10*a(n-3) +5*a(n-4) -14*a(n-5) +9*a(n-6) -2*a(n-7) for n>10
EXAMPLE
Some solutions for n=4 k=4
..0..1..0..2..2....0..0..2..0..2....1..1..1..1..1....1..1..1..2..2
..0..1..0..0..0....0..0..2..0..2....1..0..0..0..0....0..0..0..0..0
..0..1..0..0..0....1..0..2..0..2....2..0..0..0..0....1..1..1..1..1
..0..1..0..0..0....1..0..2..0..1....2..0..0..0..0....1..0..0..0..0
..2..2..1..1..1....2..1..2..0..1....2..0..0..0..0....2..1..1..1..0
CROSSREFS
Sequence in context: A044969 A300536 A260536 * A251130 A231077 A044372
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 30 2014
STATUS
approved

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Last modified July 18 04:59 EDT 2024. Contains 374377 sequences. (Running on oeis4.)