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A279923
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Number of nX4 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
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1
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3, 142, 14281, 1230799, 99427182, 7837914954, 601248781220, 45231133438998, 3348526427263799, 244650217481299630, 17677455777661411625, 1265259778269055650555, 89821449423672575925643
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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 for n=3
..0..1..0..0. .0..1..0..1. .0..1..1..1. .0..1..2..0. .0..1..1..1
..1..0..1..0. .1..2..2..1. .1..2..1..0. .0..0..1..0. .2..1..0..1
..0..0..1..0. .0..2..1..1. .0..0..2..1. .0..1..2..2. .0..2..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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