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A217965
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Number of 2Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..2 2Xn array
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1
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9, 17, 91, 321, 1341, 5269, 21379, 85633, 344955, 1386679, 5579199, 22440525, 90271591, 363117835, 1460674773, 5875648527, 23635221447, 95074256043, 382442764281, 1538402105163, 6188327969265, 24892972759953, 100133687989929
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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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FORMULA
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Empirical: a(n) = 2*a(n-1) +7*a(n-2) +6*a(n-3) -2*a(n-4) -10*a(n-5) -11*a(n-6) -32*a(n-7) -23*a(n-8) -16*a(n-9) +22*a(n-10) +4*a(n-11)
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EXAMPLE
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Some solutions for n=3
..1..0..0....0..0..1....0..0..2....2..0..1....2..1..2....0..0..0....2..1..1
..1..0..0....1..1..2....1..1..1....0..0..2....1..1..1....1..0..1....1..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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