A234440 Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).

6272, 66228, 666880, 7165920, 72539432, 790261148, 8028682984, 88710949848, 904037477472, 10133236760728, 103526333639528, 1177176079902156, 12050136543826616, 138970750405944768, 1424578896164786720

Offset

1,1

Links

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

Example

Some solutions for n=2:
  2 1 2 1 1 1    1 1 1 0 0 0    1 2 2 1 2 2    2 1 0 0 2 0
  2 2 2 2 1 2    0 1 0 0 1 2    0 0 1 1 1 0    1 1 1 0 1 0
  1 2 1 2 0 0    1 1 1 0 0 2    1 0 0 1 2 2    2 1 0 0 2 2

Crossrefs

Column 5 of A234443.

Sequence in context: A045187 A223465 A035904 * A254635 A189655 A071091

Adjacent sequences: A234437 A234438 A234439 * A234441 A234442 A234443

Keyword

nonn

Author

R. H. Hardin, Dec 26 2013

Status

approved