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A235244 Number of (n+1) X (4+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
16150, 41246, 108374, 338282, 1039502, 3521538, 11626526, 41097666, 141434374, 515121002, 1826965054, 6821774074, 24807303134, 94706874378, 352039395094, 1371301958834, 5197451865566, 20616621173346, 79485584533838 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A235248.
LINKS
FORMULA
Empirical recurrence of order 61 (see link above).
EXAMPLE
Some solutions for n=3:
3 4 7 3 7 6 2 4 0 3 2 6 4 6 2 6 3 4 2 5
0 7 4 6 4 5 7 3 5 2 3 1 5 1 3 4 7 2 6 3
1 2 5 1 5 6 2 4 0 3 0 4 2 4 0 5 2 3 1 4
0 7 4 6 4 3 5 1 3 0 2 0 4 0 2 4 7 2 6 3
CROSSREFS
Sequence in context: A184405 A134120 A109566 * A236872 A031843 A031624
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2014
STATUS
approved

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Last modified July 14 02:38 EDT 2024. Contains 374291 sequences. (Running on oeis4.)