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A222795
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Number of 2Xn 0..3 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order
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1
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0, 3, 4, 18, 62, 302, 1246, 6094, 26914, 134498, 609026, 3063602, 14101834, 70953566, 330924894, 1660510388, 7832513154, 39166394428, 186507266186, 929635136724, 4461584935084, 22180085525044, 107124575002552, 531493854988914
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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All solutions for n=3
..0..0..1....0..0..0....0..0..1....0..0..0
..0..0..0....0..1..1....1..1..1....1..0..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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