A183962 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one

81, 4401, 746017, 492135291, 1088246684231

Offset

1,1

Comments

Diagonal of A183971

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 4X4
..0..0..0..1....0..0..1..1....0..1..0..2....0..0..2..1....0..2..0..1
..1..1..2..1....0..2..0..1....0..1..1..0....1..1..0..1....1..0..1..0
..0..1..0..2....1..0..2..0....0..0..0..1....0..1..2..0....2..0..1..0
..0..2..0..2....1..0..1..0....0..2..1..1....1..2..0..2....0..2..0..1
...
...2..3..4.......2..3..3.......2..3..3.......2..3..4.......3..3..2...
...3..4..5.......3..4..3.......1..2..2.......3..4..3.......3..2..2...
...3..3..4.......2..3..3.......2..3..3.......4..5..4.......4..3..2...

Crossrefs

Sequence in context: A016888 A205238 A006312 * A174698 A204222 A264193

Adjacent sequences: A183959 A183960 A183961 * A183963 A183964 A183965

Keyword

nonn

Author

R. H. Hardin Jan 08 2011

Status

approved