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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 R. H. Hardin, Table of n, a(n) for n = 1..84 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 Adjacent sequences:  A222915 A222916 A222917 * A222919 A222920 A222921 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 09 2013 STATUS approved

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Last modified December 3 15:34 EST 2021. Contains 349463 sequences. (Running on oeis4.)