A250833 Number of (n+1) X (n+1) 0..2 arrays with no 2 X 2 subblock having a diagonal absolute difference less than its antidiagonal absolute difference.

55, 4131, 1301955, 1751284191, 10042099602523, 245660147951906863, 25646762400407469919163, 11428578484306710530465058551

Offset

1,1

Comments

Diagonal of A250841.

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Cf. A250841.

Sequence in context: A081993 A060077 A035323 * A206097 A103918 A013537

Adjacent sequences: A250830 A250831 A250832 * A250834 A250835 A250836

Keyword

nonn

Author

R. H. Hardin, Nov 27 2014

Status

approved