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A147014 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11111-00010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 5, 13, 31, 111, 377, 1545, 10231, 72633, 559663, 5155711, 55582209, 698619471, 11001973207, 206072905483, 4521907343165, 116328599746355, 3545239477906611, 127491366766265465 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.1.0.0

.0.0.0.0.1.1.0.0

.0.0.0.0.0.1.0.0

.0.0.0.0.0.1.1.0

.0.1.0.0.0.1.0.0

.1.1.1.1.1.0.0.0

.0.0.0.1.0.0.0.0

.0.0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A121129 A051402 A147022 * A146376 A146368 A147424

Adjacent sequences:  A147011 A147012 A147013 * A147015 A147016 A147017

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified October 23 23:11 EDT 2019. Contains 328379 sequences. (Running on oeis4.)