A235207 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 5, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

5696, 18444, 61160, 215996, 781040, 2971196, 11553392, 46833260, 193465560, 826218532, 3581539136, 15932122292, 71644936160, 328631733908, 1518363127144, 7123179412380, 33563057736176, 160050497011676, 764880136880880

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 62

Formula

Empirical recurrence of order 62 (see link above).

Example

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

Crossrefs

Column 3 of A235212.

Sequence in context: A269297 A269344 A184147 * A355317 A252342 A237743

Adjacent sequences: A235204 A235205 A235206 * A235208 A235209 A235210

Keyword

nonn

Author

R. H. Hardin, Jan 04 2014

Status

approved