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A235253 Number of (n+1) X (3+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1
2672, 8328, 24232, 80812, 251656, 878988, 2873128, 10362212, 35132248, 129681452, 452445096, 1699526196, 6067071432, 23102391980, 84025709016, 323468947012, 1194691128744, 4640522916700, 17359355152040, 67935545177540 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A235258.
LINKS
FORMULA
Empirical recurrence of order 57 (see link above).
EXAMPLE
Some solutions for n=4:
6 0 6 2 1 0 3 1 1 5 1 5 3 1 3 0 6 5 6 5
0 1 0 3 0 6 2 7 5 2 5 2 2 7 2 6 0 6 0 6
6 0 6 2 3 2 5 3 3 7 3 7 6 4 6 3 5 4 5 4
2 3 2 5 0 6 2 7 4 1 4 1 2 7 2 6 1 7 1 7
7 1 7 3 1 0 3 1 1 5 1 5 5 3 5 2 6 5 6 5
CROSSREFS
Sequence in context: A010088 A252301 A250855 * A309762 A344192 A345896
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2014
STATUS
approved

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Last modified February 28 17:13 EST 2024. Contains 370400 sequences. (Running on oeis4.)