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A206137 T(n,k) = number of (n+1) X (k+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases. 9
256, 564, 564, 3092, 6668, 3092, 19660, 91924, 91924, 19660, 125236, 1269044, 2761756, 1269044, 125236, 797996, 17521788, 83120732, 83120732, 17521788, 797996, 5085012, 241927532, 2502596196, 5465582068, 2502596196, 241927532 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts:

......256.........564...........3092..............19660................125236

......564........6668..........91924............1269044..............17521788

.....3092.......91924........2761756...........83120732............2502596196

....19660.....1269044.......83120732.........5465582068..........359793857820

...125236....17521788.....2502596196.......359793857820........51845281856116

...797996...241927532....75353928196.....23692759265020......7476894104333060

..5085012..3340355572..2268967605164...1560344155530612...1078605317680077404

.32403084.46121153588.68320694237116.102763262525972772.155614824084934672796

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..144

EXAMPLE

Some solutions for n=4, k=3:

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

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

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

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

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

CROSSREFS

Sequence in context: A294153 A235060 A260243 * A206130 A110297 A134608

Adjacent sequences: A206134 A206135 A206136 * A206138 A206139 A206140

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 04 2012

STATUS

approved

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Last modified February 3 04:55 EST 2023. Contains 360024 sequences. (Running on oeis4.)