A234987 Number of (n+1) X (4+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

7554, 35598, 206556, 1525462, 12242044, 105948984, 951853990, 8853338774, 84210673350, 816873730308, 8033167367750, 79893700183320, 800974540818196, 8081147949233154, 81903548032822434, 833020114573408402

Offset

1,1

Comments

Column 4 of A234991.

Links

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

Example

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

Crossrefs

Sequence in context: A031137 A380994 A210171 * A157322 A172443 A374788

Adjacent sequences: A234984 A234985 A234986 * A234988 A234989 A234990

Keyword

nonn

Author

R. H. Hardin, Jan 02 2014

Status

approved