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A234704 Number of (n+1) X (n+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6 (constant-stress 1 X 1 tilings). 0
322, 7154, 87698, 1108418, 9883666, 104373122, 850224914, 8324205794 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3:

  6 2 2 2     2 5 4 5     0 5 0 6     3 6 2 3     4 3 5 1

  4 6 0 6     4 1 6 1     6 5 6 6     7 4 6 1     2 7 3 5

  7 3 3 3     2 5 4 5     1 6 1 7     4 7 3 4     6 5 7 3

  4 6 0 6     3 0 5 0     1 0 1 1     6 3 5 0     1 6 2 4

CROSSREFS

Diagonal of A234712.

Sequence in context: A234712 A234705 A324629 * A266885 A253368 A334182

Adjacent sequences:  A234701 A234702 A234703 * A234705 A234706 A234707

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2013

STATUS

approved

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Last modified July 5 05:47 EDT 2022. Contains 355087 sequences. (Running on oeis4.)