A190532 Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 antidiagonally

64, 768, 13824, 331776, 11943936, 644972544, 54177693696, 6826389405696, 1351625102327808, 416300531516964864, 203987260443312783360, 157070190541350843187200, 193510474746944238806630400

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..57

Example

Some solutions for 4X4
..1..0..0..1....1..0..0..0....1..0..0..1....1..0..0..0....1..0..0..0
..0..1..0..0....0..0..0..1....0..1..1..0....0..0..0..0....0..0..0..0
..0..0..1..0....0..0..0..1....0..1..1..0....0..0..0..0....0..0..1..1
..1..0..0..0....0..1..1..0....1..0..0..1....0..0..0..0....0..0..1..1

Crossrefs

Sequence in context: A316882 A317610 A264260 * A181889 A236182 A164280

Adjacent sequences: A190529 A190530 A190531 * A190533 A190534 A190535

Keyword

nonn

Author

R. H. Hardin May 12 2011

Status

approved