A234886 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 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

2896, 11984, 43680, 209740, 884976, 4616452, 20512760, 112743844, 512846088, 2929812696, 13502550424, 79476854244, 369248890000, 2223584184224, 10383954125888, 63603016362920, 297999250816344, 1847988056907872

Offset

1,1

Links

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

Example

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

Crossrefs

Column 4 of A234890.

Sequence in context: A235819 A235575 A281657 * A236655 A235822 A235825

Adjacent sequences: A234883 A234884 A234885 * A234887 A234888 A234889

Keyword

nonn

Author

R. H. Hardin, Jan 01 2014

Status

approved