A234910 Number of (n+1) X (6+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

2497560, 42777680, 672221348, 13775604012, 268581208108, 6149073639928, 133204903441540, 3259245492367820, 74403803878824296, 1896162085005376272

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=1:
  4 2 0 3 2 6 2       4 0 3 2 4 2 4       4 6 0 2 4 1 4
  6 3 2 6 4 7 4       6 3 7 5 6 5 6       6 7 2 3 6 4 6

Crossrefs

Column 6 of A234911.

Sequence in context: A390579 A114659 A179733 * A233927 A157769 A183651

Adjacent sequences: A234907 A234908 A234909 * A234911 A234912 A234913

Keyword

nonn

Author

R. H. Hardin, Jan 01 2014

Status

approved