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A234325 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant stress 1X1 tilings) 0
80, 3296, 287888, 53812604, 21167182224, 17748461638244, 31177141022942176, 116792004877640829552 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A234333

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A035735 A035805 A017743 * A196280 A286789 A264372

Adjacent sequences:  A234322 A234323 A234324 * A234326 A234327 A234328

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 23 2013

STATUS

approved

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Last modified September 22 12:34 EDT 2020. Contains 337289 sequences. (Running on oeis4.)