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A222475
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Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order
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1
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4, 10, 42, 235, 1450, 30883, 267772, 7073732, 67911068, 1835377464, 17762404598, 478005487727, 4694125854134, 124576004895424, 1240340640828968, 32486189811716076, 327738319146833494, 8473377832221877331
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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=4
..0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0....0..0..1..0
..0..0..0..0....0..0..0..0....0..0..0..2....0..0..0..0....0..0..0..1
..1..1..0..0....0..0..0..0....0..0..0..3....0..0..0..0....0..0..0..0
..1..1..0..0....0..1..2..3....0..0..0..2....1..0..1..1....0..0..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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