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A302152
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Number of 4 X n 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
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1
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8, 1, 10, 17, 56, 255, 1038, 4771, 21866, 102060, 476499, 2227609, 10440370, 48996354, 230159202, 1081764728, 5086004704, 23916740145, 112479869517, 529026120838, 2488273643127, 11703911410284, 55051772837784
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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 recurrence of order 85 (see link above).
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EXAMPLE
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Some solutions for n=5
..0..1..1..1..1. .0..1..1..1..0. .0..1..0..1..1. .0..1..1..0..1
..1..1..1..1..0. .1..1..1..1..1. .0..1..1..1..0. .1..1..1..0..0
..0..1..0..1..1. .1..1..0..1..1. .1..1..0..1..0. .1..1..0..0..0
..1..1..1..1..0. .1..1..1..1..0. .0..1..0..1..0. .0..1..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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