A146216 Number of n X n binary arrays with all ones connected only in a 101-111-010 pattern in any orientation.

1, 1, 5, 17, 45, 317, 5736, 99087, 2137142, 81606063, 5341611544, 471313494449, 60737322268763, 12198817353925669

Offset

1,3

Links

Table of n, a(n) for n=1..14.

Example

Maximal 8 X 8 example
.0.1.0.1.0.1.0.1
.0.1.1.1.0.1.1.1
.0.0.1.0.0.0.1.0
.1.1.0.0.0.0.0.0
.0.1.1.0.0.0.0.0
.1.1.0.1.1.0.1.1
.0.0.1.1.0.1.1.0
.0.0.0.1.1.0.1.1

Crossrefs

Sequence in context: A271302 A147043 A146264 * A046787 A003295 A228857

Adjacent sequences: A146213 A146214 A146215 * A146217 A146218 A146219

Keyword

nonn

Author

R. H. Hardin

Status

approved