A234988 Number of (n+1) X (5+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).

35072, 189200, 1303920, 12242044, 128653892, 1507413164, 18608169852, 241470307440, 3223991647750, 44160189525640, 614262146735550, 8656420502385760, 122980147463555208, 1758712132194011052

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..109

Example

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

Crossrefs

Column 5 of A234991.

Sequence in context: A031835 A250525 A251063 * A075831 A213805 A204491

Adjacent sequences: A234985 A234986 A234987 * A234989 A234990 A234991

Keyword

nonn

Author

R. H. Hardin, Jan 02 2014

Status

approved