A235318 Number of (n+1) X (7+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7 (constant-stress 1 X 1 tilings).

128128, 206360, 316912, 598976, 1062832, 2291696, 4632208, 11046512, 24862768, 63985520, 156648592, 427611056, 1117112752, 3196232816, 8787317008, 26128056752, 74857634608

Offset

1,1

Comments

Column 7 of A235319.

Links

Table of n, a(n) for n=1..17.

Example

Some solutions for n=1:
  0 5 0 6 1 6 1 4     2 5 0 5 4 5 1 6     5 4 5 4 5 2 5 1
  3 1 3 2 4 2 4 0     4 0 2 0 6 0 3 1     0 6 0 6 0 4 0 3

Crossrefs

Sequence in context: A189185 A349698 A234978 * A151812 A224585 A190819

Adjacent sequences: A235315 A235316 A235317 * A235319 A235320 A235321

Keyword

nonn

Author

R. H. Hardin, Jan 05 2014

Status

approved