A234242 Number of (n+1) X (2+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).

6706, 99630, 1520024, 23428586, 361889580, 5604275160, 86776363660, 1346057282610, 20871073347970, 324182229853644, 5033011970696922, 78280166521734740, 1216896695697878704, 18952578238483018624

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 45

Formula

Empirical recurrence of order 45 (see link above).

Example

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

Crossrefs

Column 2 of A234245.

Sequence in context: A031846 A289516 A239565 * A252602 A224689 A190292

Adjacent sequences: A234239 A234240 A234241 * A234243 A234244 A234245

Keyword

nonn

Author

R. H. Hardin, Dec 21 2013

Status

approved