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A234549 T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant stress 1X1 tilings) 7
208, 1212, 1212, 7056, 6896, 7056, 41112, 39188, 39188, 41112, 239648, 222988, 217304, 222988, 239648, 1397712, 1269812, 1207448, 1207448, 1269812, 1397712, 8156096, 7237508, 6716768, 6556488, 6716768, 7237508, 8156096, 47619552 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........208.......1212........7056.......41112......239648.....1397712

.......1212.......6896.......39188......222988.....1269812.....7237508

.......7056......39188......217304.....1207448.....6716768....37416120

......41112.....222988.....1207448.....6556488....35656244...194284128

.....239648....1269812.....6716768....35656244...189641952..1011141204

....1397712....7237508....37416120...194284128..1011141204..5278556248

....8156096...41285540...208681224..1060310544..5401882616.27621051428

...47619552..235717236..1165446648..5797286912.28926522000

..278172288.1346930052..6516597192.31746284736

.1625861952.7703391252.36485687312

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..84

FORMULA

Empirical for column k:

k=1: a(n) = 6*a(n-1) +34*a(n-2) -204*a(n-3) -40*a(n-4) +240*a(n-5)

k=2: [order 15]

k=3: [order 49]

EXAMPLE

Some solutions for n=2 k=4

..0..4..0..5..0....0..3..2..4..4....0..2..5..5..3....3..4..1..5..0

..1..2..1..3..1....5..5..1..0..3....3..2..2..5..0....4..2..2..3..1

..4..2..4..3..4....4..1..0..2..2....5..1..4..4..2....1..2..5..3..4

CROSSREFS

Sequence in context: A255082 A255075 A304281 * A234543 A233665 A233659

Adjacent sequences:  A234546 A234547 A234548 * A234550 A234551 A234552

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Dec 28 2013

STATUS

approved

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Last modified October 19 23:51 EDT 2021. Contains 348095 sequences. (Running on oeis4.)