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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.)