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A282127
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Number of nX4 0..2 arrays with no element unequal to more than four of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
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1
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0, 412, 14952, 210308, 2582100, 27360940, 288592122, 2859154700, 28049884760, 268586269768, 2542642344876, 23784762203080, 220524010142108, 2029186356052980, 18552089141901938, 168691006136119700
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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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FORMULA
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Empirical recurrence of order 80 (see link above)
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EXAMPLE
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Some solutions for n=3
..0..0..1..0. .0..0..1..2. .0..1..0..1. .0..1..2..0. .0..1..2..2
..1..1..2..1. .0..1..1..0. .2..0..0..0. .1..1..2..0. .1..1..1..2
..0..1..1..2. .0..1..0..1. .2..2..0..1. .0..1..1..1. .2..1..0..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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