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A234913 Number of (n+1) X (n+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 0
40, 360, 3684, 55492, 991144, 28854040, 911837036, 56108159524, 3092040129896 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=4:
3 2 1 2 1 0 3 2 1 0 1 4 3 0 1 2 1 2 1 0
2 3 0 3 4 3 4 1 2 3 2 3 4 3 2 3 4 3 0 1
3 2 1 2 1 0 3 2 1 0 1 0 3 0 1 2 1 2 1 4
4 1 2 1 2 1 2 3 4 1 2 3 4 3 2 3 4 3 0 1
1 0 3 4 3 2 1 4 3 2 1 4 3 0 1 4 3 4 3 2
CROSSREFS
Diagonal of A234921.
Sequence in context: A247407 A251431 A285919 * A190312 A229532 A252180
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2014
STATUS
approved

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Last modified February 24 08:44 EST 2024. Contains 370294 sequences. (Running on oeis4.)