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A235064 Number of (n+1) X (1+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1
168, 848, 4352, 22576, 117232, 609412, 3167392, 16467664, 85596352, 445030452, 2313215088, 12026817096, 62514004752, 325021440292, 1689424028512, 8783616241536, 45656226614400, 237374848616996, 1233847154123504 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n) = 35*a(n-2) -235*a(n-4) +543*a(n-6) -458*a(n-8) +96*a(n-10).
EXAMPLE
Some solutions for n=5:
1 6 3 4 0 2 4 6 0 4 3 5 5 0 0 1 4 3 0 1
3 5 4 2 1 6 6 5 4 5 2 1 6 4 2 0 3 5 4 2
4 3 5 0 0 2 4 6 6 4 0 2 4 5 3 4 4 3 2 3
3 5 3 1 4 3 3 2 0 1 6 5 5 3 4 2 0 2 6 4
4 3 1 2 0 2 4 6 4 2 2 4 1 2 2 3 1 0 1 2
0 2 0 4 2 1 6 5 0 1 4 3 0 4 4 2 5 1 6 4
CROSSREFS
Column 1 of A235071.
Sequence in context: A110285 A302887 A235071 * A070835 A112551 A303622
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2014
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)