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A234687
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Number of (n+1) X (5+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 5 (constant-stress 1 X 1 tilings).
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1
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131200, 281612, 603480, 1602224, 4224328, 13220576, 40731576, 144171008, 498365320, 1942449632, 7343739000, 30950526464, 125722585288, 564467755616, 2427720463416, 11459328322688, 51522026849800, 252746043487712
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OFFSET
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1,1
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LINKS
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FORMULA
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Empirical: a(n) = 8*a(n-1) +136*a(n-2) -1228*a(n-3) -7714*a(n-4) +83412*a(n-5) +227220*a(n-6) -3310020*a(n-7) -3144813*a(n-8) +85322244*a(n-9) -10139052*a(n-10) -1502272464*a(n-11) +1272592288*a(n-12) +18484107136*a(n-13) -25856757520*a(n-14) -159615082880*a(n-15) +298588477264*a(n-16) +954259846848*a(n-17) -2239825910784*a(n-18) -3795391531008*a(n-19) +11239750642176*a(n-20) +9072344881152*a(n-21) -37315540684800*a(n-22) -8727234969600*a(n-23) +78238462464000*a(n-24) -12303747072000*a(n-25) -93182607360000*a(n-26) +40370503680000*a(n-27) +47656304640000*a(n-28) -30098718720000*a(n-29).
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EXAMPLE
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Some solutions for n=1:
3 5 2 6 4 0 1 3 6 6 1 3 2 0 5 1 5 0 0 6 5 6 0 5
3 0 2 1 4 5 6 3 1 6 6 3 1 4 4 5 4 4 1 2 6 2 1 1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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