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A234556 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 (constant-stress 1 X 1 tilings). 0
70, 546, 2390, 11982, 42982, 187686, 635654, 2614518, 8740870, 34959606, 117588230, 464375382, 1585487302 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=5:
0 4 1 4 2 4 2 1 3 1 2 2 1 0 2 0 2 0 0 4 0 4 0 2
1 1 2 1 3 1 0 3 1 3 0 4 0 3 1 3 1 3 3 3 3 3 3 1
0 4 1 4 2 4 3 2 4 2 3 3 1 0 2 0 2 0 0 4 0 4 0 2
0 0 1 0 2 0 0 3 1 3 0 4 1 4 2 4 2 4 4 4 4 4 4 2
0 4 1 4 2 4 1 0 2 0 1 1 3 2 4 2 4 2 0 4 0 4 0 2
2 2 3 2 4 2 0 3 1 3 0 4 0 3 1 3 1 3 3 3 3 3 3 1
CROSSREFS
Diagonal of A234564.
Sequence in context: A060541 A235302 A229576 * A183715 A104475 A169712
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 28 2013
STATUS
approved

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Last modified June 23 01:58 EDT 2024. Contains 373629 sequences. (Running on oeis4.)