A235208 Number of (n+1) X (4+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).

27812, 76112, 215996, 672256, 2154516, 7402144, 26061700, 96901472, 368028508, 1459917480, 5897896244, 24670254104, 104750603428, 457238180840, 2019073139228, 9112536852800, 41470836368596, 192014376762880

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..121

Example

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

Crossrefs

Column 4 of A235212.

Sequence in context: A096027 A249000 A058419 * A251494 A327962 A046333

Adjacent sequences: A235205 A235206 A235207 * A235209 A235210 A235211

Keyword

nonn

Author

R. H. Hardin, Jan 04 2014

Status

approved