A234442 Number of (n+1) X (7+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).

87808, 1578036, 26023136, 483370700, 8028682984, 153582428536, 2561421896376, 50550841783616, 845061581153064, 17225338328311560, 288096942502518832, 6067393540914839284, 101341384172618252496, 2204356516673445136156

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..125

Example

Some solutions for n=1:
  1 2 1 2 1 0 0 0     0 0 1 2 1 0 0 2     2 1 1 1 0 1 2 0
  0 0 0 2 0 0 1 0     1 0 0 2 0 0 1 2     0 0 1 0 0 0 2 1

Crossrefs

Column 7 of A234443.

Sequence in context: A232674 A236788 A183658 * A204508 A180106 A190382

Adjacent sequences: A234439 A234440 A234441 * A234443 A234444 A234445

Keyword

nonn

Author

R. H. Hardin, Dec 26 2013

Status

approved