A235190 Number of (n+1) X (n+1) 0..6 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).

136, 1544, 12176, 96848, 652872, 4812096, 31498952, 224694240, 1462784688, 10244417184

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Diagonal of A235198.

Sequence in context: A251168 A023070 A015163 * A249985 A072897 A254703

Adjacent sequences: A235187 A235188 A235189 * A235191 A235192 A235193

Keyword

nonn,more

Author

R. H. Hardin, Jan 04 2014

Status

approved