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A235099 Number of (n+1) X (n+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 0
154, 2498, 30312, 304746, 2613410, 20552136, 147069470, 1019570090, 6616067648 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=3:
2 3 2 1 4 5 2 5 4 6 3 6 3 2 3 5 3 5 2 5
3 0 3 6 3 0 1 0 6 4 5 4 0 3 0 6 4 2 3 2
2 3 2 1 2 3 0 3 4 6 3 6 2 1 2 4 1 3 0 3
1 6 1 4 3 0 1 0 5 3 4 3 3 6 3 1 2 0 1 0
CROSSREFS
Diagonal of A235107.
Sequence in context: A160840 A160841 A160853 * A332421 A227977 A282557
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2014
STATUS
approved

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Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)