A234887 Number of (n+1) X (5+1) 0..5 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).

9192, 40856, 163352, 884976, 4318800, 26272908, 138216800, 902409352, 4907082840, 33616093680, 185936954632, 1318067732684, 7361429326200, 53481533152552, 300446060684776, 2221662510752072, 12526677175945288

Offset

1,1

Links

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

Example

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

Crossrefs

Column 5 of A234890.

Sequence in context: A250149 A243969 A231424 * A251902 A234139 A175743

Adjacent sequences: A234884 A234885 A234886 * A234888 A234889 A234890

Keyword

nonn

Author

R. H. Hardin, Jan 01 2014

Status

approved