A252524 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 3 6 or 7

750, 337, 466, 790, 4420, 13184, 25280, 433664, 1580032, 3235840, 191758336, 781844480, 1656750080, 363528716288, 1573635751936, 3393024163840, 2862166206054400

Offset

1,1

Comments

Diagonal of A252532

Links

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

Example

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

Crossrefs

Sequence in context: A263381 A071924 A078549 * A252525 A252681 A252532

Adjacent sequences: A252521 A252522 A252523 * A252525 A252526 A252527

Keyword

nonn

Author

R. H. Hardin, Dec 18 2014

Status

approved