A147035 Number of n X n binary arrays with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.

1, 1, 1, 5, 17, 39, 181, 1975, 28231, 443863, 9105701, 306959063, 15386456557, 1024328375043, 94252026378527

Offset

1,4

Links

Table of n, a(n) for n=1..15.

Example

Maximal 8 X 8 example
.0.0.1.0.0.0.1.0
.1.1.1.1.0.0.1.0
.0.0.1.0.1.1.1.1
.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0
.0.1.0.0.1.1.1.1
.1.1.1.1.0.1.0.0
.0.1.0.0.0.1.0.0

Crossrefs

Sequence in context: A146717 A147467 A146272 * A146134 A011931 A260981

Adjacent sequences: A147032 A147033 A147034 * A147036 A147037 A147038

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved