A205064 Number of (n+1)X(n+1) 0..1 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors

16, 64, 144, 376, 856, 1984, 4480, 9856, 22144, 47104, 105472, 219136, 489472, 999424, 2228224, 4489216, 9994240, 19922944, 44302336, 87556096, 194510848, 381681664, 847249408, 1652555776, 3665821696

Offset

1,1

Comments

Diagonal of A205072

Links

Table of n, a(n) for n=1..25.

Example

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

Crossrefs

Sequence in context: A277016 A016802 A309573 * A102860 A136264 A266103

Adjacent sequences: A205061 A205062 A205063 * A205065 A205066 A205067

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved