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A230907
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Number of nX5 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero
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1
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0, 84, 634, 4308, 30304, 219696, 1603356, 11727974, 85870504, 629050716, 4609162588, 33775007838, 247504872508, 1813755858252, 13291604028764, 97404233447816, 713804471793532, 5230957793540932, 38333938333202052
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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 recurrence of order 89 (see link above)
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EXAMPLE
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Some solutions for n=4
..0..1..0..2..3....0..3..1..0..1....0..1..2..1..0....0..2..0..1..2
..3..2..3..1..0....1..2..3..2..0....2..3..0..2..3....1..3..2..3..1
..0..1..0..2..3....0..1..0..1..3....0..1..3..1..2....0..1..0..2..0
..3..2..3..1..2....2..3..2..0..2....3..2..0..3..1....3..2..1..3..2
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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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