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A167247
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Number of ways to partition an n X 4 grid into 2 connected equal-area regions
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0
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1, 4, 19, 70, 245, 856, 2967, 10164, 34463, 115904, 387379, 1288574, 4270853, 14116936, 46567963, 153385198
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OFFSET
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1,2
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LINKS
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EXAMPLE
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All solutions for n=3
...1.1.1.1...1.1.1.1...1.1.1.1...1.1.1.1...1.1.1.1...1.1.1.1...1.1.1.1
...1.1.2.2...1.2.1.2...1.2.2.1...1.2.2.2...2.1.1.2...2.1.2.1...2.2.1.1
...2.2.2.2...2.2.2.2...2.2.2.2...1.2.2.2...2.2.2.2...2.2.2.2...2.2.2.2
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...1.1.1.1...1.1.1.2...1.1.1.2...1.1.1.2...1.1.1.2...1.1.2.2...1.1.2.2
...2.2.2.1...1.1.1.2...1.1.2.2...1.2.1.2...1.2.2.2...1.1.1.2...1.1.2.2
...2.2.2.1...2.2.2.2...1.2.2.2...1.2.2.2...1.1.2.2...1.2.2.2...1.1.2.2
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...1.1.2.2...1.2.2.2...1.2.2.2...1.2.2.2...1.2.2.2
...1.2.2.2...1.1.1.2...1.1.2.2...1.2.1.2...1.2.2.2
...1.1.1.2...1.1.2.2...1.1.1.2...1.1.1.2...1.1.1.1
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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