A252415 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7

830, 854, 2348, 6834, 96549, 1757580, 7509929, 405192038, 25078925104, 125775052127, 24752513789099, 5464239857976239, 29856983036081165, 21749215324538900039, 17567703374829363297798

Offset

1,1

Comments

Diagonal of A252423

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A065215 A252988 A366704 * A252423 A252416 A125519

Adjacent sequences: A252412 A252413 A252414 * A252416 A252417 A252418

Keyword

nonn

Author

R. H. Hardin, Dec 17 2014

Status

approved