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 A230275 T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 8
 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 8, 28, 8, 0, 0, 30, 258, 258, 30, 0, 0, 108, 2318, 5734, 2318, 108, 0, 0, 386, 19996, 115630, 115630, 19996, 386, 0, 0, 1376, 173042, 2348840, 5524854, 2348840, 173042, 1376, 0, 0, 4902, 1495602, 47524048, 261026756 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 COMMENTS Table starts .0....0.......0.........0............0...............0..................0 .0....0.......2.........8...........30.............108................386 .0....2......28.......258.........2318...........19996.............173042 .0....8.....258......5734.......115630.........2348840...........47524048 .0...30....2318....115630......5524854.......261026756........12303458948 .0..108...19996...2348840....261026756.....28716109350......3159756711522 .0..386..173042..47524048..12303458948...3159756711522....810027275568580 .0.1376.1495602.960953664.580318201510.347321368287746.207640367754692812 LINKS R. H. Hardin, Table of n, a(n) for n = 1..127 FORMULA Empirical for column k: k=1: a(n) = a(n-1) k=2: a(n) = 4*a(n-1) -a(n-2) -2*a(n-3) k=3: [order 10] k=4: [order 34] EXAMPLE Some solutions for n=3 k=4 ..0..1..0..1....0..1..2..1....0..1..2..0....0..1..2..0....0..1..2..0 ..1..2..0..2....2..1..0..2....2..2..0..1....2..0..1..1....2..0..2..1 ..0..2..1..0....2..0..0..1....1..1..0..2....1..2..0..2....2..0..1..0 CROSSREFS Sequence in context: A069971 A167291 A063865 * A230592 A282699 A182107 Adjacent sequences: A230272 A230273 A230274 * A230276 A230277 A230278 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Oct 14 2013 STATUS approved

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Last modified November 26 18:12 EST 2022. Contains 358362 sequences. (Running on oeis4.)