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).

11976, 86704, 676192, 5686836, 48272960, 417137872, 3604917936, 31461207572, 274289989296, 2412618175328, 21191825497096, 187812605182108, 1661568339714520, 14834880496119016, 132156788082113096

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

Author

R. H. Hardin, Jan 03 2014

Status

approved