A147224 - OEIS

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A147224

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11011-01110 pattern in any orientation.

1, 1, 1, 1, 15, 5, 62, 17, 602, 89, 29524, 5783, 1544922, 270221, 203301503, 19830584, 60493044496, 4522566093, 26251057879932, 1590451774176, 23899128298949817, 1088025398592657

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,5

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.1.0.0.0.0.0.0.1

.1.1.0.0.0.0.1.1

.0.1.0.0.0.0.1.0

.1.1.0.0.0.0.1.1

.1.0.0.0.0.0.0.1

CROSSREFS

Sequence in context: A147422 A147084 A147361 * A147060 A110791 A241361

Adjacent sequences: A147221 A147222 A147223 * A147225 A147226 A147227

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved