A146738 Number of n X n binary arrays with all ones connected only in a 1110-1111 pattern in any orientation.

1, 1, 1, 25, 197, 1317, 27967, 769895, 31824755, 2225324253, 231497267715, 37487310176573

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.1.1.1.0.1.1.1.1
.1.1.1.1.0.1.1.1
.0.0.0.0.0.0.0.0
.1.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.1
.0.0.0.0.0.0.0.0
.1.1.1.0.1.1.1.1
.1.1.1.1.0.1.1.1

Crossrefs

Sequence in context: A101775 A017222 A271535 * A146722 A042210 A220677

Adjacent sequences: A146735 A146736 A146737 * A146739 A146740 A146741

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved