A234897 Number of (n+1) X (7+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

1676576, 19965444, 208211944, 3064189932, 41268054688, 700047980248, 10593797616896, 196773939067288, 3144319026581672, 62377683142994196

Offset

1,1

Links

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

Example

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

Crossrefs

Column 7 of A234898.

Sequence in context: A158957 A136295 A250932 * A126437 A016868 A016916

Adjacent sequences: A234894 A234895 A234896 * A234898 A234899 A234900

Keyword

nonn

Author

R. H. Hardin, Jan 01 2014

Status

approved