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 A233682 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 6 (6 maximizes T(1,1)) 9
 48, 184, 184, 648, 928, 648, 2440, 4448, 4448, 2440, 8712, 23568, 28544, 23568, 8712, 32456, 117744, 216592, 216592, 117744, 32456, 116872, 621904, 1500800, 2442208, 1500800, 621904, 116872, 432456, 3145968, 11482368, 25036784, 25036784 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......48.......184.........648..........2440............8712.............32456 .....184.......928........4448.........23568..........117744............621904 .....648......4448.......28544........216592.........1500800..........11482368 ....2440.....23568......216592.......2442208........25036784.........289389648 ....8712....117744.....1500800......25036784.......365293440........6336415296 ...32456....621904....11482368.....289389648......6336415296......169016684160 ..116872...3145968....81243904....3057995568.....95799636288.....3879764059776 ..432456..16510480...617735680...35239626640...1660462199232...103768584198400 .1565704..84078896..4416166400..377551693872..25500227965248..2432577744933760 .5768392.439062352.33345630720.4321333099024.438642994287168.64581965636210432 LINKS R. H. Hardin, Table of n, a(n) for n = 1..219 FORMULA Empirical for column k: k=1: a(n) = a(n-1) +12*a(n-2) -4*a(n-3) -16*a(n-4) k=2: [order 10] k=3: [order 17] k=4: [order 45] k=5: [order 99] EXAMPLE Some solutions for n=3 k=4 ..0..2..0..2..0....1..1..1..2..1....0..1..3..1..0....0..0..0..2..3 ..0..1..0..1..0....0..2..0..2..3....0..2..2..2..2....1..2..1..2..1 ..2..1..2..1..2....0..1..1..2..1....0..1..0..1..3....0..2..3..2..0 ..2..3..3..1..3....2..2..3..2..3....0..2..2..2..2....0..1..3..1..1 CROSSREFS Sequence in context: A244178 A131683 A066134 * A233675 A005911 A130566 Adjacent sequences:  A233679 A233680 A233681 * A233683 A233684 A233685 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 14 2013 STATUS approved

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Last modified August 13 05:41 EDT 2020. Contains 336442 sequences. (Running on oeis4.)