A237852 Number of (n+1)X(n+1) 0..1 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors

2, 14, 184, 4826, 315896, 51576880, 19525964230, 16973909462042, 34503263815183768, 164908132253513334892, 1846422015725929807175264, 48336702149147111721837411520, 2960196197873119343187488260921706

Offset

1,1

Comments

Diagonal of A237859

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for n=4
..1..1..1..1..1....0..0..1..1..0....1..1..0..1..1....0..0..0..1..1
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..1..1....0..0..0..1..1....0..0..1..1..0....0..0..0..0..0
..1..1..1..1..1....0..0..0..1..1....1..1..1..1..0....1..1..1..1..1

Crossrefs

Sequence in context: A191236 A217905 A370940 * A219874 A074655 A268005

Adjacent sequences: A237849 A237850 A237851 * A237853 A237854 A237855

Keyword

nonn

Author

R. H. Hardin, Feb 14 2014

Status

approved