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A250944
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Number of (2+1)X(n+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction
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1
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125, 699, 3355, 15431, 67595, 287045, 1188599, 4827913, 19308213, 76254749, 298049037, 1154930779, 4442888465, 16986179207, 64600876511, 244577899139, 922363567903, 3466733140929, 12991657380635, 48562243341429
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OFFSET
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1,1
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COMMENTS
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Row 2 of A250942
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 10*a(n-1) -29*a(n-2) -6*a(n-3) +136*a(n-4) -90*a(n-5) -217*a(n-6) +186*a(n-7) +143*a(n-8) -124*a(n-9) -32*a(n-10) +24*a(n-11)
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EXAMPLE
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Some solutions for n=4
..0..0..1..0..0....2..0..2..0..1....0..1..2..1..1....1..1..1..0..2
..0..1..0..1..1....1..1..1..1..0....1..2..1..2..0....0..2..2..1..1
..0..2..1..2..2....0..2..0..2..1....2..1..2..1..1....0..2..2..1..1
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CROSSREFS
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Sequence in context: A045170 A235896 A250634 * A251288 A060093 A253345
Adjacent sequences: A250941 A250942 A250943 * A250945 A250946 A250947
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Nov 28 2014
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STATUS
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approved
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