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A253698
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T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically
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14
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16, 40, 40, 104, 76, 104, 264, 150, 146, 264, 680, 282, 234, 304, 680, 1736, 540, 356, 480, 602, 1736, 4456, 1026, 618, 700, 878, 1182, 4456, 11400, 1984, 968, 992, 1120, 1472, 2416, 11400, 29224, 3782, 1608, 1262, 1632, 1638, 2982, 4772, 29224, 74824
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OFFSET
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1,1
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COMMENTS
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Table starts
....16....40...104...264...680..1736..4456.11400.29224.74824.191720.491016
....40....76...150...282...540..1026..1984..3782..7270.13880..26644..51026
...104...146...234...356...618...968..1608..2558..4278..6854..11266..18192
...264...304...480...700...992..1262..1790..2538..4020..5990...8836..12394
...680...602...878..1120..1632..1914..2626..3598..5568..7834..11444..15184
..1736..1182..1472..1638..2386..3042..4010..5178..6934..8938..12212..16174
..4456..2416..2982..3136..4180..5030..6558..8846.12620.17170..22264..27490
.11400..4772..5282..4782..6552..7800.10428.14710.20260.27658..35292..45002
.29224..9652..9880..7926.10696.12646.16796.22964.30864.42644..55562..75580
.74824.19152.18552.14462.18236.20932.26124.36540.51630.74332..93964.121868
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LINKS
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FORMULA
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Empirical for column k:
k=1: a(n) = a(n-1) +4*a(n-2)
k=2: [order 16]
k=3: [order 19] for n>21
k=4: [order 22] for n>24
k=5: [order 26] for n>31
k=6: [order 28] for n>33
k=7: [order 32] for n>38
Empirical for row n:
n=1: a(n) = a(n-1) +4*a(n-2)
n=2: [order 16]
n=3: [order 19] for n>21
n=4: [order 19] for n>26
n=5: [order 27] for n>34
n=6: [order 21] for n>31
n=7: [order 25] for n>37
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EXAMPLE
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Some solutions for n=4 k=4
..0..1..1..1..0....1..1..0..1..1....1..0..0..0..1....0..1..0..1..1
..1..0..1..1..0....0..1..0..1..1....0..1..0..0..0....0..0..0..1..0
..1..1..0..0..1....0..1..1..0..0....1..1..0..1..1....0..1..0..0..1
..0..0..1..0..1....1..0..0..1..0....1..1..1..0..1....0..0..1..1..1
..1..0..1..0..0....1..0..0..1..0....1..0..0..0..1....1..1..0..1..1
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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