A252597 Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5

303, 1151, 7769, 81441, 1547711, 49281939, 2541062469, 205891508707, 25990396753815, 5072924616525133

Offset

1,1

Comments

Diagonal of A252605

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=4
..2..1..0..2..2..2....2..2..2..0..2..2....1..2..1..1..1..2....2..1..0..2..1..1
..2..2..0..2..2..0....0..2..2..2..2..2....2..1..1..1..1..1....0..2..1..0..2..1
..2..1..0..2..2..2....2..2..2..2..0..2....1..1..2..1..1..1....1..0..2..1..0..2
..2..1..0..2..2..2....2..0..2..2..2..2....1..1..1..1..1..2....2..2..0..2..1..0
..2..1..0..2..2..0....2..2..2..2..2..2....1..1..1..1..1..1....0..2..1..0..2..2
..2..2..0..2..2..2....2..2..0..2..2..2....1..1..2..1..1..1....2..0..2..1..0..2

Crossrefs

Sequence in context: A098241 A252605 A252598 * A237093 A236813 A332130

Adjacent sequences: A252594 A252595 A252596 * A252598 A252599 A252600

Keyword

nonn

Author

R. H. Hardin, Dec 19 2014

Status

approved