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A183600
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1/6 the number of (n+1)X7 0..2 arrays with every 2X2 subblock containing all three values
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1
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10572, 574185, 27768032, 1376627608, 68026656422, 3366668183708, 166653005250320, 8251614370134644, 408619818725184342, 20236484168674868650, 1002238533164802053394, 49638595435230968839084
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions with a(1,1)=0 for 3X7
..0..0..2..0..1..1..2....0..0..0..1..2..2..0....0..0..0..0..1..0..1
..1..2..1..0..2..0..1....1..2..1..2..0..1..0....1..2..1..2..2..0..2
..2..0..2..0..1..0..2....2..0..0..1..2..0..2....0..0..0..1..0..1..0
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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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