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 A186923 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces 8
 0, 704, 704, 2176, 13440, 2176, 30976, 253312, 253312, 30976, 166272, 4615296, 7946432, 4615296, 166272, 1567936, 86388160, 394724320, 394724320, 86388160, 1567936, 10419200, 1613838400, 15491352288, 39825200832, 15491352288 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ..........0............704.............2176.............30976 ........704..........13440...........253312...........4615296 .......2176.........253312..........7946432.........394724320 ......30976........4615296........394724320.......39825200832 .....166272.......86388160......15491352288.....3861027028096 ....1567936.....1613838400.....686342587904...380882328583712 ...10419200....30161413056...28533024476512.37393297725524928 ...85438016...563483938112.1225810619871552 ..615338112.10530498631296 .4793908736 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for 4X3 ..0..1..0....2..2..0....2..2..1....2..0..1....2..2..0....0..2..2....0..1..3 ..3..2..1....1..3..3....0..3..3....2..1..3....3..1..1....2..3..1....2..2..1 ..1..2..3....3..3..2....2..3..2....3..0..1....0..0..2....3..2..1....3..1..2 ..3..2..1....0..1..2....2..1..0....3..0..3....0..0..0....1..0..1....1..0..3 CROSSREFS Column 1 is A185799 Sequence in context: A253396 A188370 A185571 * A185807 A105846 A323342 Adjacent sequences:  A186920 A186921 A186922 * A186924 A186925 A186926 KEYWORD nonn,tabl AUTHOR R. H. Hardin Feb 28 2011 STATUS approved

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Last modified December 8 06:50 EST 2021. Contains 349590 sequences. (Running on oeis4.)