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A235079 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 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 0
38, 198, 830, 3558, 13446, 53590, 196302, 763814, 2809478, 10902494, 40824462, 159294206, 608274054, 2390311294, 9275377822 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=5:
0 2 0 2 1 3 1 4 2 3 1 4 3 1 4 1 3 0 1 4 1 3 1 3
3 1 3 1 4 2 3 2 4 1 3 2 0 2 1 2 0 1 3 2 3 1 3 1
0 2 0 2 1 3 1 4 2 3 1 4 3 1 4 1 3 0 1 4 1 3 1 3
3 1 3 1 4 2 3 2 4 1 3 2 1 3 2 3 1 2 3 2 3 1 3 1
1 3 1 3 2 4 1 4 2 3 1 4 3 1 4 1 3 0 0 3 0 2 0 2
2 0 2 0 3 1 3 2 4 1 3 2 0 2 1 2 0 1 3 2 3 1 3 1
CROSSREFS
Diagonal of A235087.
Sequence in context: A137022 A160064 A297541 * A005910 A281769 A191698
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2014
STATUS
approved

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Last modified July 14 20:04 EDT 2024. Contains 374323 sequences. (Running on oeis4.)