A252080 Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 or 4

64, 322, 3326, 47266, 1034546, 35987921, 1915241208, 157183478333, 19993599538566, 3912790092731608, 1178650827932347077, 547811008058997697527, 392513656335386815116037

Offset

1,1

Comments

Diagonal of A252088

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A231942 A221686 A211258 * A017366 A186441 A297642

Adjacent sequences: A252077 A252078 A252079 * A252081 A252082 A252083

Keyword

nonn

Author

R. H. Hardin, Dec 13 2014

Status

approved