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 A222842 T(n,k)=Number of nXk 0..3 arrays with no more than floor(nXk/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order 4
 1, 1, 1, 2, 8, 2, 11, 105, 105, 11, 34, 1585, 4797, 1585, 34, 131, 23107, 326408, 326408, 23107, 131, 438, 353631, 15364848, 70144361, 15364848, 353631, 438, 2150, 5338646, 1077545438, 15371324917, 15371324917, 1077545438, 5338646, 2150, 7676 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Table starts .....1..........1.............2..............11................34 .....1..........8...........105............1585.............23107 .....2........105..........4797..........326408..........15364848 ....11.......1585........326408........70144361.......15371324917 ....34......23107......15364848.....15371324917....10720259944904 ...131.....353631....1077545438...3410802057085.11000375151330544 ...438....5338646...52487425596.763478480305913 ..2150...81874696.3689615795056 ..7676.1252153841 .32491 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for n=3 k=4 ..0..1..0..2....0..1..0..1....0..1..0..2....0..1..0..0....0..1..1..2 ..3..0..3..2....1..2..1..0....0..0..2..2....2..2..0..1....1..0..2..3 ..2..1..3..0....0..1..2..2....2..1..0..3....3..0..1..0....0..1..2..3 CROSSREFS Column 1 is A222650 Sequence in context: A086396 A195844 A222828 * A098471 A074723 A286455 Adjacent sequences:  A222839 A222840 A222841 * A222843 A222844 A222845 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 06 2013 STATUS approved

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Last modified December 12 07:31 EST 2019. Contains 329948 sequences. (Running on oeis4.)