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A298914
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Number of n X 5 0..1 arrays with every element equal to 0, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
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1
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1, 3, 3, 4, 7, 9, 15, 26, 46, 84, 151, 276, 506, 929, 1708, 3138, 5770, 10611, 19515, 35893, 66014, 121417, 223319, 410746, 755479, 1389539, 2555759, 4700772, 8646066, 15902594, 29249427, 53798082, 98950098, 181997603, 334745780, 615693476
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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: a(n) = a(n-1) +a(n-2) +a(n-3) +a(n-5) -a(n-6) -a(n-7) -a(n-8) for n>9.
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EXAMPLE
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Some solutions for n=5
..0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0. .0..0..0..0..0
..0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0. .0..0..0..0..0
..0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0. .0..0..0..0..0
..0..0..1..1..1. .0..0..0..1..1. .1..1..1..1..1. .0..0..0..0..0
..0..0..1..1..1. .0..0..0..1..1. .1..1..1..1..1. .0..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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