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 A207235 T(n,k)=Number of nXk 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column, diagonal or antidiagonal 8
 3, 9, 9, 23, 81, 23, 61, 529, 529, 61, 161, 3721, 5853, 3721, 161, 425, 25921, 79353, 79353, 25921, 425, 1121, 180625, 1089017, 2464241, 1089017, 180625, 1121, 2957, 1256641, 14540437, 77937497, 77937497, 14540437, 1256641, 2957, 7801, 8743849 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....3.......9.........23............61..............161................425 ....9......81........529..........3721............25921.............180625 ...23.....529.......5853.........79353..........1089017...........14540437 ...61....3721......79353.......2464241.........77937497.........2320163321 ..161...25921....1089017......77937497.......5437970705.......350097798369 ..425..180625...14540437....2320163321.....350097798369.....47274560618753 .1121.1256641..191801477...68168506265...22315875854161...6288613378797777 .2957.8743849.2533992385.2020945709121.1438362000618041.848441499201176937 LINKS R. H. Hardin, Table of n, a(n) for n = 1..111 EXAMPLE Some solutions for n=4 k=3 ..0..1..2....1..2..2....1..2..0....2..1..0....2..1..0....0..1..2....0..0..0 ..0..2..1....2..1..0....1..2..2....0..2..2....0..1..2....0..2..2....1..2..0 ..0..2..1....0..0..1....2..2..0....2..0..0....1..2..0....0..2..2....1..2..2 ..2..1..0....1..2..2....0..0..2....2..1..0....1..2..0....0..1..2....0..0..2 CROSSREFS Column 1 is A207008 Column 2 is A207009 Sequence in context: A223789 A223975 A226852 * A207228 A207015 A268809 Adjacent sequences: A207232 A207233 A207234 * A207236 A207237 A207238 KEYWORD nonn,tabl AUTHOR R. H. Hardin Feb 16 2012 STATUS approved

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Last modified November 29 22:05 EST 2023. Contains 367452 sequences. (Running on oeis4.)