A234243 Number of (n+1) X (3+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).

72616, 1520024, 32965378, 725628904, 16021165696, 354931091338, 7860119921126, 174432581257432, 3867909998650764, 85938055271287920, 1907697414837426570, 42433568115687443458, 942986024965772638510, 20999313840564845514606

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..130

Example

Some solutions for n=1:
  3 5 7 7     4 6 3 2     3 1 0 5     1 3 0 1     5 5 4 7
  0 0 0 2     1 1 0 1     6 6 3 6     2 6 1 0     2 4 1 2

Crossrefs

Column 3 of A234245.

Sequence in context: A093212 A114258 A238151 * A260053 A237555 A186047

Adjacent sequences: A234240 A234241 A234242 * A234244 A234245 A234246

Keyword

nonn

Author

R. H. Hardin, Dec 21 2013

Status

approved