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A146384 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0110-1111 pattern in any orientation. 0
1, 1, 1, 1, 3, 10, 29, 100, 387, 2276, 17581, 155034, 1632582, 20304423, 321404215, 6545616593, 163131399978, 4942168957230, 181963337378973, 8263219425456168, 468671383459094714, 32913148405732346545 (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

.0.0.0.0.1.0.0.0

.0.0.0.1.1.0.0.0

.0.0.0.1.1.0.0.0

.0.1.1.0.1.0.0.1

.1.1.1.1.0.0.1.1

.0.0.0.0.0.0.1.1

.0.0.0.0.1.1.0.1

.0.0.0.1.1.1.1.0

CROSSREFS

Sequence in context: A301879 A147062 A293155 * A166174 A006484 A144007

Adjacent sequences:  A146381 A146382 A146383 * A146385 A146386 A146387

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified August 19 18:51 EDT 2019. Contains 326133 sequences. (Running on oeis4.)