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A187030
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Number of 5-step one or two collinear space at a time queen's tours on an n X n board summed over all starting positions
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0
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0, 0, 5120, 45152, 161256, 376248, 696992, 1121176, 1647008, 2273384, 3000304, 3827768, 4755776, 5784328, 6913424, 8143064, 9473248, 10903976, 12435248
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OFFSET
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1,3
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 50272*n^2 - 328792*n + 534104 for n>7
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EXAMPLE
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Some solutions for 4X4
..0..0..0..0....0..5..0..0....0..0..4..0....0..0..0..0....0..0..0..0
..0..5..0..0....0..0..0..1....0..3..0..5....1..2..0..3....0..3..5..4
..0..1..2..0....0..4..3..0....0..2..0..0....5..0..0..0....0..0..2..0
..0..4..3..0....0..2..0..0....1..0..0..0....0..4..0..0....0..0..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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