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.

1, 1, 1, 1, 1, 1, 19, 35, 679, 1365, 22713, 61459, 2460007, 8324377, 1000960863, 4362315603, 920463675841, 5070018879619, 1889649557770845, 13120916750335663, 10628808830660687857, 93523395817222374455

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