A146775 Number of n X n binary arrays with all ones connected only in a 0010-1010-1111 pattern in any orientation.

1, 1, 1, 17, 49, 205, 3001, 66003, 1489297, 39955495, 2140110575, 190524932103, 22346344948573

Offset

1,4

Links

Table of n, a(n) for n=1..13.

Example

Maximal 8 X 8 example
.1.1.1.1.0.0.0.0
.1.0.1.0.0.0.0.0
.0.0.1.0.0.0.1.1
.0.0.0.0.0.0.0.1
.1.0.0.0.0.1.1.1
.1.1.1.0.1.0.0.1
.1.0.0.0.1.0.1.0
.1.1.0.1.1.1.1.0

Crossrefs

Sequence in context: A342609 A146799 A147201 * A147217 A147051 A146855

Adjacent sequences: A146772 A146773 A146774 * A146776 A146777 A146778

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved