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A187441
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T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors
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10
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81, 646, 646, 5344, 14178, 5344, 44195, 311730, 311730, 44195, 365485, 6858445, 18257013, 6858445, 365485, 3022484, 150878368, 1070374436, 1070374436, 150878368, 3022484, 24995294, 3319295436, 62735788524, 167339492229
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OFFSET
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1,1
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COMMENTS
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Table starts
..........81............646..............5344..............44195
.........646..........14178............311730............6858445
........5344.........311730..........18257013.........1070374436
.......44195........6858445........1070374436.......167339492229
......365485......150878368.......62735788524.....26149356865336
.....3022484.....3319295436.....3677337022406...4086873166309438
....24995294....73023484028...215547981233289.638715674028172903
...206705746..1606497082565.12634446300216814
..1709412335.35342494847192
.14136474668
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LINKS
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EXAMPLE
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Some solutions for 4X3
..2..0..1....2..0..0....2..0..0....1..0..0....2..0..0....1..0..0....2..0..1
..0..1..1....1..1..2....1..1..0....2..2..2....2..1..0....1..0..2....2..2..2
..0..1..1....0..2..2....2..0..2....0..0..2....2..2..2....2..0..1....0..0..2
..2..0..1....2..2..1....1..1..1....2..0..2....1..2..1....2..2..0....0..2..0
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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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