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 A222889 T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order 6
 1, 0, 0, 0, 4, 0, 6, 22, 22, 6, 16, 184, 380, 184, 16, 16, 1222, 8986, 8986, 1222, 16, 40, 9918, 138026, 465938, 138026, 9918, 40, 280, 73038, 3581166, 24893100, 24893100, 3581166, 73038, 280, 768, 571736, 57340458, 1351294947, 2737507523, 1351294947 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts ....1........0...........0.............6.............16..............16 ....0........4..........22...........184...........1222............9918 ....0.......22.........380..........8986.........138026.........3581166 ....6......184........8986........465938.......24893100......1351294947 ...16.....1222......138026......24893100.....2737507523....518031070610 ...16.....9918.....3581166....1351294947...518031070610.201317962199862 ...40....73038....57340458...74202775749.57938967907855 ..280...571736..1518623878.4110642829357 ..768..4390202.24604366312 .1440.34351802 .3808 LINKS R. H. Hardin, Table of n, a(n) for n = 1..71 EXAMPLE Some solutions for n=3 k=4 ..0..1..0..0....0..1..0..0....0..1..1..0....0..1..1..2....0..1..2..1 ..2..0..0..2....2..1..1..2....2..0..1..1....1..0..2..1....2..2..0..0 ..0..2..2..1....0..1..2..0....0..2..1..1....2..2..2..0....1..2..0..2 CROSSREFS Sequence in context: A194193 A265644 A296230 * A223114 A222832 A279871 Adjacent sequences:  A222886 A222887 A222888 * A222890 A222891 A222892 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 08 2013 STATUS approved

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Last modified January 16 19:48 EST 2022. Contains 350376 sequences. (Running on oeis4.)