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A279805
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T(n,k)=Number of nXk 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
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5
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0, 0, 0, 2, 2, 2, 4, 22, 22, 4, 14, 196, 740, 196, 14, 40, 1848, 19376, 19376, 1848, 40, 120, 16720, 507986, 1476500, 507986, 16720, 120, 352, 149392, 12910722, 110514378, 110514378, 12910722, 149392, 352, 1032, 1317720, 323712032, 8028037200
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OFFSET
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1,4
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COMMENTS
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Table starts
....0........0............2..............4..............14...............40
....0........2...........22............196............1848............16720
....2.......22..........740..........19376..........507986.........12910722
....4......196........19376........1476500.......110514378.......8028037200
...14.....1848.......507986......110514378.....23500346624....4849917013896
...40....16720.....12910722.....8028037200...4849917013896.2840019147221278
..120...149392....323712032...573336320344.982389352238899
..352..1317720...8013623436.40364489132724
.1032.11508016.196400852184
.3008.99674848
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LINKS
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FORMULA
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Empirical for column k:
k=1: a(n) = 4*a(n-1) -8*a(n-3) -4*a(n-4) for n>5
k=2: [order 12]
k=3: [order 36] for n>37
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EXAMPLE
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Some solutions for n=3 k=4
..0..0..1..1. .0..1..2..1. .0..1..2..2. .0..0..1..2. .0..1..0..0
..2..2..2..1. .1..1..1..0. .0..1..1..0. .2..1..2..2. .2..2..2..0
..1..0..1..2. .0..2..0..0. .0..1..1..0. .2..1..0..1. .1..2..1..2
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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