A234164 Number of (n+1) X (3+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).

4296, 32070, 236876, 1773484, 13227132, 99877680, 751361300, 5729616704, 43493374260, 335194819624, 2568518101508, 20015511073672, 154853905277996, 1220427512643784, 9532590261966940, 75975862900079592, 598936631627547644

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 80

Formula

Empirical recurrence of order 80 (see link above).

Example

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

Crossrefs

Column 3 of A234169.

Sequence in context: A204401 A204400 A271104 * A124596 A224522 A210263

Adjacent sequences: A234161 A234162 A234163 * A234165 A234166 A234167

Keyword

nonn

Author

R. H. Hardin, Dec 20 2013

Status

approved