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A235243 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 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1
3746, 10866, 31858, 108374, 359962, 1305758, 4596034, 17276982, 63001946, 243085134, 909934434, 3586769950, 13711602746, 55035076230, 214054835346, 872409743726, 3441514152170, 14207234974590, 56691746507634 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A235248.
LINKS
FORMULA
Empirical recurrence of order 61 (see link above).
EXAMPLE
Some solutions for n=4:
3 4 3 4 3 5 0 3 4 6 3 6 5 1 4 0 0 1 0 1
7 2 7 2 6 2 3 0 5 1 4 1 3 5 2 4 7 2 7 2
0 1 0 1 4 6 1 4 3 5 2 5 6 2 5 1 3 4 3 4
7 2 7 2 6 2 3 0 6 2 5 2 2 4 1 3 5 0 5 0
2 3 2 3 3 5 0 3 1 3 0 3 7 3 6 2 2 3 2 3
CROSSREFS
Sequence in context: A166262 A340403 A235977 * A368589 A180974 A285158
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2014
STATUS
approved

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Last modified July 15 06:17 EDT 2024. Contains 374324 sequences. (Running on oeis4.)