A252326 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 8

2018, 5716, 10070, 63277, 1091359, 19701604, 287805377, 24700406029, 1636863026983, 40269631420248, 15643196598176434, 4050536254392615455, 146409505382398682020, 266464589627529326041843

Offset

1,1

Comments

Diagonal of A252334

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

Some solutions for n=4
..3..3..2..3..0..2....3..2..3..0..2..3....2..3..3..2..3..3....0..0..3..3..2..3
..3..3..2..3..3..0....2..1..2..2..1..2....2..3..3..2..0..3....3..2..0..3..2..0
..2..2..1..2..2..1....3..2..0..3..2..0....1..2..2..1..2..2....2..1..2..2..1..2
..3..3..2..0..3..2....3..2..3..0..2..3....2..3..0..2..3..0....3..2..3..0..2..3
..3..0..2..3..0..2....0..1..2..2..1..2....2..0..3..2..0..3....3..2..0..3..2..3
..2..0..1..2..2..2....3..0..0..3..2..3....1..2..2..1..2..0....2..1..2..2..1..0

Crossrefs

Sequence in context: A119517 A252334 A252327 * A119423 A176913 A013687

Adjacent sequences: A252323 A252324 A252325 * A252327 A252328 A252329

Keyword

nonn

Author

R. H. Hardin, Dec 16 2014

Status

approved