A255093 Number of (n+2) X (n+2) 0..1 arrays with no 3 X 3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1.

36, 189, 1838, 25413, 554091, 19198366, 1018478173, 83424236667, 10600414554200, 2073988286314137, 624690506094584769, 290291489884708296332, 207973048180805421940626, 229556436731155431563064899

Offset

1,1

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Diagonal of A255101.

Sequence in context: A211753 A211764 A383689 * A017138 A339981 A304378

Adjacent sequences: A255090 A255091 A255092 * A255094 A255095 A255096

Keyword

nonn,more

Author

R. H. Hardin, Feb 14 2015

Status

approved