A146815 Number of n X n binary arrays with all ones connected only in a 1000-1110-0111 pattern in any orientation.

1, 1, 1, 17, 65, 429, 5631, 146823, 4351701, 186793381, 13761626501, 1695235337657

Offset

1,4

Links

Table of n, a(n) for n=1..12.

Example

Maximal 8 X 8 example
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.1.0.0.0.1.0.0.1
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.1.0.0.1.0.0.0.1
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0

Crossrefs

Sequence in context: A146807 A156570 A147231 * A360818 A216143 A082614

Adjacent sequences: A146812 A146813 A146814 * A146816 A146817 A146818

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved