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A222918 T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order 6
1, 0, 0, 0, 6, 0, 6, 18, 18, 6, 16, 136, 160, 136, 16, 16, 654, 2952, 2952, 654, 16, 40, 3972, 17518, 62336, 17518, 3972, 40, 280, 21778, 356398, 1309863, 1309863, 356398, 21778, 280, 768, 127226, 2118905, 27663713, 26742406, 27663713, 2118905, 127226, 768 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,5
COMMENTS
Table starts
.....1........0..........0............6............16.............16
.....0........6.........18..........136...........654...........3972
.....0.......18........160.........2952.........17518.........356398
.....6......136.......2952........62336.......1309863.......27663713
....16......654......17518......1309863......26742406.....2133576918
....16.....3972.....356398.....27663713....2133576918...165904381397
....40....21778....2118905....590514107...43875762623.13105585711754
...280...127226...44960137..12759661261.3643286829221
...768...727214..272872198.278866376604
..1440..4237154.5911110630
..3808.24617576
.16352
LINKS
EXAMPLE
Some solutions for n=3 k=4
..0..1..0..2....0..1..0..1....0..1..1..2....0..1..1..2....0..1..2..1
..2..2..1..0....2..0..2..0....2..1..1..0....1..0..2..2....2..1..0..0
..1..2..0..0....1..2..1..0....0..2..2..1....2..1..0..1....1..1..2..1
CROSSREFS
Column 1 is A222884
Sequence in context: A341483 A223033 A237444 * A280480 A223104 A222722
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 09 2013
STATUS
approved

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Last modified May 21 04:06 EDT 2024. Contains 372720 sequences. (Running on oeis4.)