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 A184694 T(n,k)=1/3 the number of nXk 0..2 arrays with no element equal both to the element above and to the element to its left 8
 1, 3, 3, 9, 24, 9, 27, 192, 192, 27, 81, 1536, 4080, 1536, 81, 243, 12288, 86688, 86688, 12288, 243, 729, 98304, 1841856, 4890528, 1841856, 98304, 729, 2187, 786432, 39133824, 275895264, 275895264, 39133824, 786432, 2187, 6561, 6291456 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts .....1.........3.............9.................27.....................81 .....3........24...........192...............1536..................12288 .....9.......192..........4080..............86688................1841856 ....27......1536.........86688............4890528..............275895264 ....81.....12288.......1841856..........275895264............41325395328 ...243.....98304......39133824........15564399648..........6189975781728 ...729....786432.....831474432.......878052505824........927173138866560 ..2187...6291456...17666296320.....49534593003552.....138877768818516672 ..6561..50331648..375354928128...2794452367733472...20801977386689522208 .19683.402653184.7975147677696.157646678048909856.3115849763962378244064 LINKS R. H. Hardin, Table of n, a(n) for n = 1..241 EXAMPLE Some solutions for 4X3 with a(1,1)=0 ..0..2..2....0..1..2....0..1..1....0..2..1....0..1..0....0..2..1....0..1..0 ..2..1..0....2..1..2....0..1..2....0..1..2....1..2..0....1..2..1....0..2..0 ..2..0..1....2..1..0....2..0..0....0..1..0....1..2..1....2..1..2....1..1..0 ..1..0..0....0..1..0....0..1..0....0..2..2....2..0..1....0..1..1....0..0..1 CROSSREFS Column 1 is A000244(n-1) Column 2 is A103333 Sequence in context: A316220 A059728 A257180 * A215885 A176158 A083008 Adjacent sequences:  A184691 A184692 A184693 * A184695 A184696 A184697 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 20 2011 STATUS approved

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Last modified June 5 12:47 EDT 2020. Contains 334840 sequences. (Running on oeis4.)