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A224155
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Number of nX5 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing
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1
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16, 101, 373, 1156, 3469, 10562, 32910, 105020, 342575, 1136503, 3815322, 12904448, 43836891, 149266926, 508857756, 1735637682, 5921189882, 20201365165, 68920464104, 235127759007, 802136163910, 2736424196762, 9334965911219
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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) = 6*a(n-1) -9*a(n-2) -a(n-3) +a(n-4) +23*a(n-5) -38*a(n-6) +42*a(n-7) -41*a(n-8) +89*a(n-9) -67*a(n-10) -9*a(n-11) +5*a(n-12) -32*a(n-13) -50*a(n-14) -12*a(n-15) -58*a(n-16) -28*a(n-17) +12*a(n-18) +4*a(n-20) for n>22
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EXAMPLE
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Some solutions for n=3
..1..1..0..0..0....1..0..0..0..0....1..0..0..0..0....0..1..0..0..0
..1..1..1..0..0....0..0..0..0..0....0..1..0..0..0....1..1..1..0..0
..1..1..1..1..1....0..0..0..1..0....1..0..0..0..0....1..1..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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