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A234327
Number of (n+1) X (2+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).
1
432, 3296, 25728, 203008, 1603680, 12713312, 100679584, 799588512, 6341424800, 50436411040, 400533940512, 3190038587424, 25365477524640, 202291348481184, 1610482677443104, 12860140933119776, 102502504089127840
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n) = 10*a(n-1) +59*a(n-2) -768*a(n-3) +608*a(n-4) +7580*a(n-5) -11628*a(n-6) -18088*a(n-7) +32880*a(n-8) +3232*a(n-9) -17600*a(n-10) +4224*a(n-11).
EXAMPLE
Some solutions for n=3:
3 2 2 0 0 1 3 2 1 1 1 0 2 2 3 1 3 2 2 2 0
0 0 1 1 2 2 1 1 1 2 3 3 0 1 1 1 2 0 2 1 0
2 3 3 2 2 3 2 1 0 2 2 3 0 2 1 2 2 1 3 3 3
0 0 1 0 1 1 3 3 1 3 2 2 0 3 3 3 2 2 2 3 2
CROSSREFS
Column 2 of A234333.
Sequence in context: A015229 A360840 A248460 * A174717 A235418 A235422
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 23 2013
STATUS
approved