A235004 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 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

13848, 114796, 1053414, 11587376, 134675868, 1669957802, 21127926654, 272815283884, 3549809173852, 46538034485528, 612595559694614, 8095874587933366, 107312816116722666, 1426601565556675714

Offset

1,1

Links

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

Example

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

Crossrefs

Column 3 of A235007.

Sequence in context: A179582 A325886 A151642 * A263976 A189989 A069302

Adjacent sequences: A235001 A235002 A235003 * A235005 A235006 A235007

Keyword

nonn

Author

R. H. Hardin, Jan 02 2014

Status

approved