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A185807 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace 9
0, 704, 704, 2176, 13440, 2176, 30976, 260544, 260544, 30976, 166272, 5177344, 11019840, 5177344, 166272, 1567936, 104024384, 593036512, 593036512, 104024384, 1567936, 10419200, 2091689856, 29410603520, 77815012608, 29410603520 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

..........0............704.............2176..............30976

........704..........13440...........260544............5177344

.......2176.........260544.........11019840..........593036512

......30976........5177344........593036512........77815012608

.....166272......104024384......29410603520......9977246681216

....1567936.....2091689856....1501824774848...1288126250997184

...10419200....42093682560...75902079167968.166089641496321408

...85438016...847003638592.3849846787713472

..615338112.17044363936064

.4793908736

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

EXAMPLE

Some solutions for 4X3

..2..0..0....2..2..2....0..0..3....2..2..2....2..0..0....2..3..0....0..2..2

..1..1..2....3..3..3....3..0..0....3..1..0....0..0..0....2..2..2....3..3..1

..3..2..1....1..2..2....1..0..2....1..0..1....2..2..0....3..2..3....0..2..2

..2..1..2....1..3..2....0..2..2....1..0..1....0..3..3....1..0..1....2..3..1

CROSSREFS

Sequence in context: A188370 A185571 A186923 * A105846 A323342 A237009

Adjacent sequences:  A185804 A185805 A185806 * A185808 A185809 A185810

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 04 2011

STATUS

approved

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Last modified December 5 20:39 EST 2021. Contains 349558 sequences. (Running on oeis4.)