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A146579 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 19, 35, 679, 1365, 22713, 61459, 2460007, 8324377, 1000960863, 4362315603, 920463675841, 5070018879619, 1889649557770845, 13120916750335663, 10628808830660687857, 93523395817222374455 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

.1.0.1.0.0.1.0.1

.1.0.0.0.0.0.0.1

.1.1.1.0.0.1.1.1

.0.1.0.0.0.0.1.0

CROSSREFS

Sequence in context: A044445 A166055 A333414 * A146454 A186405 A240238

Adjacent sequences:  A146576 A146577 A146578 * A146580 A146581 A146582

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified May 18 18:42 EDT 2022. Contains 353824 sequences. (Running on oeis4.)