A252211 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7

874, 1078, 3303, 44776, 984604, 34351865, 1834743852, 150852965441, 19211276199350, 3761840357784412, 1133324153448762150, 526775964680392302044

Offset

1,1

Comments

Diagonal of A252219

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A251085 A334011 A206312 * A045258 A252219 A252212

Adjacent sequences: A252208 A252209 A252210 * A252212 A252213 A252214

Keyword

nonn

Author

R. H. Hardin, Dec 15 2014

Status

approved