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 A223149 T(n,k)=Number of nXk 0..2 arrays with no more than 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, 1, 1, 2, 7, 2, 10, 31, 31, 10, 24, 187, 211, 187, 24, 72, 990, 4065, 4065, 990, 72, 168, 5721, 23376, 84196, 23376, 5721, 168, 664, 32155, 487176, 1753639, 1753639, 487176, 32155, 664, 1632, 185667, 2859044, 36926759, 35160014, 36926759, 2859044, 185667 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Table starts .....1........1..........2...........10............24.............72 .....1........7.........31..........187...........990...........5721 .....2.......31........211.........4065.........23376.........487176 ....10......187.......4065........84196.......1753639.......36926759 ....24......990......23376......1753639......35160014.....2829178640 ....72.....5721.....487176.....36926759....2829178640...219590496125 ...168....32155....2859044....788312639...57855419616.17348791308859 ...664...185667...61675900..17055726949.4836446707793 ..1632..1068413..371133369.373400072400 ..5376..6209614.8139180914 .13152.36152732 .47968 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 EXAMPLE Some solutions for n=3 k=4 ..0..1..2..2....0..1..2..0....0..1..0..0....0..1..2..0....0..1..0..1 ..2..0..2..0....0..0..1..0....2..0..0..1....2..2..2..2....0..2..2..0 ..1..2..1..1....1..0..2..1....1..2..2..0....0..1..0..2....0..0..1..2 CROSSREFS Column 1 is A222848 Sequence in context: A178206 A245976 A245216 * A222853 A222654 A318059 Adjacent sequences: A223146 A223147 A223148 * A223150 A223151 A223152 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 16 2013 STATUS approved

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Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)