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A190532 Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 antidiagonally 1
64, 768, 13824, 331776, 11943936, 644972544, 54177693696, 6826389405696, 1351625102327808, 416300531516964864, 203987260443312783360, 157070190541350843187200, 193510474746944238806630400 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)