A146791 Number of n X n binary arrays with all ones connected only in a 0110-0100-1111 pattern in any orientation.

1, 1, 1, 17, 49, 129, 2513, 72929, 1541697, 32044977, 1793069393, 194582650081, 23560543717409, 3138929297030737

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.1.1.1.1.0.0.0.1
.0.1.0.0.0.1.1.1
.0.1.1.0.0.1.0.1
.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.0.0
.0.1.1.0.1.1.1.1
.0.0.1.0.0.0.1.0
.1.1.1.1.0.1.1.0

Crossrefs

Sequence in context: A113867 A049737 A146871 * A126371 A342609 A146799

Adjacent sequences: A146788 A146789 A146790 * A146792 A146793 A146794

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved