A235238 Number of (n+1) X (7+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

170864, 348876, 698304, 1593940, 3548456, 8787924, 21123784, 55565636, 141304528, 389137436, 1033108024, 2948180108, 8099212024, 23769869420, 67153607264, 201544634004, 582902960392, 1781509519796, 5256618469672

Offset

1,1

Comments

Column 7 of A235239.

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

Some solutions for n=1:
  3 1 5 1 3 0 4 0     4 2 3 0 5 1 3 1     1 6 2 6 1 4 1 5
  1 5 3 5 1 4 2 4     2 6 1 4 3 5 1 5     3 2 4 2 3 0 3 1

Crossrefs

Sequence in context: A126894 A251408 A206059 * A236985 A234088 A236498

Adjacent sequences: A235235 A235236 A235237 * A235239 A235240 A235241

Keyword

nonn

Author

R. H. Hardin, Jan 05 2014

Status

approved