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A234893 Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1
3456, 20404, 113288, 743436, 4634504, 32110856, 208211944, 1482491852, 9763925800, 70741188392, 469704123072, 3449044260864, 23022329803976, 170950844777056, 1145540286614792, 8587053971274908, 57714312161683112 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=3:
4 6 5 2 2 0 4 1 3 0 2 0 1 4 0 2 5 3 6 5
1 4 2 0 6 3 6 2 5 3 6 3 3 5 2 5 3 0 2 0
4 6 5 4 2 0 4 1 4 1 5 1 1 4 0 2 5 3 6 5
1 4 2 0 6 3 6 2 5 3 6 3 2 6 1 4 3 0 2 0
CROSSREFS
Column 3 of A234898.
Sequence in context: A340437 A278270 A179705 * A251485 A082242 A321866
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2014
STATUS
approved

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Last modified June 15 16:36 EDT 2024. Contains 373410 sequences. (Running on oeis4.)