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A235296 Number of (n+1) X (6+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings). 1
5232, 6532, 8336, 12328, 18624, 32992, 58688, 120112, 242592, 553552, 1227776, 3051088, 7238304, 19190032, 47635328, 132106192, 337361952, 963161872, 2501628416, 7271370448, 19074247584, 56053357072, 147902269568, 437595857872 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A235301.
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) +17*a(n-2) -57*a(n-3) -86*a(n-4) +372*a(n-5) +76*a(n-6) -972*a(n-7) +360*a(n-8) +864*a(n-9) -576*a(n-10).
EXAMPLE
Some solutions for n=5:
0 0 3 3 0 3 0 2 3 2 2 1 2 1 1 2 1 2 1 3 1
3 0 0 3 3 3 3 3 1 3 0 2 0 2 3 1 3 1 3 2 3
3 3 0 0 3 0 3 2 3 2 2 1 2 1 0 1 0 1 0 2 0
0 3 3 0 0 0 0 3 1 3 0 2 0 2 2 0 2 0 2 1 2
3 3 0 0 3 0 3 1 2 1 1 0 1 0 1 2 1 2 1 3 1
3 0 0 3 3 3 3 3 1 3 0 2 0 2 3 1 3 1 3 2 3
CROSSREFS
Sequence in context: A067224 A204139 A237408 * A260176 A093182 A124658
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2014
STATUS
approved

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Last modified May 26 01:42 EDT 2024. Contains 372807 sequences. (Running on oeis4.)