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A235074 Number of (n+1) X (3+1) 0..7 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
11976, 86704, 676192, 5686836, 48272960, 417137872, 3604917936, 31461207572, 274289989296, 2412618175328, 21191825497096, 187812605182108, 1661568339714520, 14834880496119016, 132156788082113096 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2:

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

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

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

CROSSREFS

Column 3 of A235078.

Sequence in context: A252948 A065701 A237491 * A251163 A236607 A156713

Adjacent sequences:  A235071 A235072 A235073 * A235075 A235076 A235077

KEYWORD

nonn,changed

AUTHOR

R. H. Hardin, Jan 03 2014

STATUS

approved

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Last modified July 1 13:45 EDT 2022. Contains 354973 sequences. (Running on oeis4.)