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A234737 Number of (n+1) X (7+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 8 (constant-stress 1 X 1 tilings). 0
426120, 760608, 1283880, 2723040, 5395128, 13083552, 29705640, 79520352, 200901240, 578901408, 1586287080, 4838786400, 14115215928 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=1:

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

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

CROSSREFS

Column 7 of A234738.

Sequence in context: A233499 A282337 A192228 * A206082 A209794 A234448

Adjacent sequences:  A234734 A234735 A234736 * A234738 A234739 A234740

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2013

STATUS

approved

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Last modified August 8 17:55 EDT 2022. Contains 356016 sequences. (Running on oeis4.)