A234918 Number of (n+1) X (5+1) 0..4 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).

3848, 13368, 49056, 221272, 991144, 4834440, 22970144, 115287720, 562322520, 2874164624, 14288844920, 74156061840, 375019322800, 1972786791616, 10136809663120, 53964866220544, 281379640263800, 1513505664100088

Offset

1,1

Links

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

Example

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

Crossrefs

Column 5 of A234921.

Sequence in context: A031560 A180505 A252878 * A015069 A015070 A031629

Adjacent sequences: A234915 A234916 A234917 * A234919 A234920 A234921

Keyword

nonn

Author

R. H. Hardin, Jan 01 2014

Status

approved