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 A239424 T(n,k)=Number of nXk 0..3 arrays with no element equal to the sum of elements to its left or the sum of the elements above it or the sum of the elements diagonally to its northwest, modulo 4 5
 3, 6, 6, 14, 18, 14, 32, 80, 80, 32, 72, 320, 684, 320, 72, 164, 1244, 4740, 4740, 1244, 164, 372, 4990, 34728, 60626, 34728, 4990, 372, 844, 19560, 247942, 811554, 811554, 247942, 19560, 844, 1916, 77220, 1823840, 10575232, 21127494, 10575232, 1823840 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....3.......6........14..........32...........72...........164...........372 ....6......18........80.........320.........1244..........4990.........19560 ...14......80.......684........4740........34728........247942.......1823840 ...32.....320......4740.......60626.......811554......10575232.....145743440 ...72....1244.....34728......811554.....21127494.....503941286...13584156020 ..164....4990....247942....10575232....503941286...22336992290.1143701274244 ..372...19560...1823840...145743440..13584156020.1143701274244 ..844...77220..13104784..1928821306.331591613568 .1916..304224..96061078.26684346362 .4348.1197958.695765782 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 FORMULA Empirical for column k: k=1: a(n) = a(n-1) +2*a(n-2) +2*a(n-3) k=2: [order 14] for n>15 EXAMPLE Some solutions for n=4 k=4 ..1..3..3..1....3..2..3..3....3..2..2..1....3..1..2..3....3..2..2..1 ..3..0..0..2....2..0..0..1....2..0..1..0....2..0..0..0....2..0..3..0 ..2..1..2..0....2..0..0..3....3..1..1..2....3..0..0..2....2..1..0..0 ..3..1..2..1....2..0..1..2....3..2..2..2....3..0..1..2....1..0..0..2 CROSSREFS Column 1 is A238768 Sequence in context: A319867 A202931 A240250 * A119306 A107972 A238775 Adjacent sequences:  A239421 A239422 A239423 * A239425 A239426 A239427 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Mar 17 2014 STATUS approved

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Last modified January 19 20:41 EST 2020. Contains 331066 sequences. (Running on oeis4.)