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A208492 T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases. 9
152, 1448, 1448, 13800, 33416, 13800, 131528, 773288, 773288, 131528, 1253608, 17903016, 43689232, 17903016, 1253608, 11948296, 414522184, 2473041560, 2473041560, 414522184, 11948296, 113880744, 9597910280, 140051200968 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........152..........1448.............13800................131528

.......1448.........33416............773288..............17903016

......13800........773288..........43689232............2473041560

.....131528......17903016........2473041560..........343092183768

....1253608.....414522184......140051200968........47661128330328

...11948296....9597910280.....7932164084608......6623652903138136

..113880744..222232271912...449271828443912....920635760474340792

.1085412040.5145622169576.25446613122575176.127966524262127129240

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..143

EXAMPLE

Some solutions for n=4, k=3:

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

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

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

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

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

CROSSREFS

Sequence in context: A253359 A226365 A085775 * A208485 A223397 A239065

Adjacent sequences:  A208489 A208490 A208491 * A208493 A208494 A208495

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 27 2012

STATUS

approved

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Last modified November 27 16:35 EST 2021. Contains 349394 sequences. (Running on oeis4.)