A252288 Number of (n+2)X(3+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 or 4

2525, 3848, 8208, 20558, 59767, 184998, 596945, 1992948, 6773233, 23197044, 79852205, 275695968, 953357995, 3299518458, 11424073467, 39564145732, 137045937259, 474760083732, 1644762043717, 5698362352810, 19743025335223

Offset

1,1

Comments

Column 3 of A252293

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A045213 A251918 A111729 * A373704 A268332 A369521

Adjacent sequences: A252285 A252286 A252287 * A252289 A252290 A252291

Keyword

nonn

Author

R. H. Hardin, Dec 16 2014

Status

approved