A235302 Number of (n+1) X (n+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6 (constant-stress 1 X 1 tilings).

70, 518, 2118, 10790, 38182, 168998, 568902, 2360486, 7845670, 31545638, 105340998, 417228710

Offset

1,1

Comments

Diagonal of A235310.

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A220365 A007330 A060541 * A229576 A234556 A183715

Adjacent sequences: A235299 A235300 A235301 * A235303 A235304 A235305

Keyword

nonn

Author

R. H. Hardin, Jan 05 2014

Status

approved