A252376 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 7

578, 555, 632, 744, 1305, 2356, 3495, 6665, 13006, 20114, 40514, 81962, 128415, 264951, 543931, 856087, 1783465

Offset

1,1

Comments

Diagonal of A252384

Links

Table of n, a(n) for n=1..17.

Example

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

Crossrefs

Sequence in context: A163053 A097770 A252377 * A031522 A234500 A252384

Adjacent sequences: A252373 A252374 A252375 * A252377 A252378 A252379

Keyword

nonn

Author

R. H. Hardin, Dec 17 2014

Status

approved