A235173 Number of (n+1) X (5+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

281580, 1373616, 6664620, 32642908, 160169432, 790073988, 3906036120, 19401099892, 96570078596, 482795643156, 2418442014900, 12165215446444, 61303653175348, 310155807654948, 1571790478344524, 7995710085830632

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..30

Example

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

Crossrefs

Column 5 of A235175.

Sequence in context: A257158 A254740 A131263 * A245659 A321055 A185886

Adjacent sequences: A235170 A235171 A235172 * A235174 A235175 A235176

Keyword

nonn

Author

R. H. Hardin, Jan 04 2014

Status

approved