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A187441
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
10
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
OFFSET
1,1
COMMENTS
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
LINKS
EXAMPLE
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
CROSSREFS
Sequence in context: A185848 A237629 A236720 * A187433 A269055 A236876
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 10 2011
STATUS
approved