A147043 Number of n X n binary arrays with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.

1, 1, 1, 5, 17, 45, 273, 2925, 46625, 908301, 25944849, 1141847565, 74712257377, 7074982666029, 978286939049873, 197925384324109741, 58779837596021528865

Offset

1,4

Links

Table of n, a(n) for n=1..17.

Example

Maximal 8 X 8 example
.0.0.0.0.0.1.0.0
.0.0.1.0.1.1.1.0
.0.1.1.0.0.0.1.1
.0.0.1.1.1.0.1.0
.0.1.0.1.0.1.0.0
.1.1.0.0.1.1.1.0
.0.1.1.1.0.0.1.1
.0.0.1.0.0.0.1.0

Crossrefs

Sequence in context: A147397 A147193 A271302 * A146264 A146216 A046787

Adjacent sequences: A147040 A147041 A147042 * A147044 A147045 A147046

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved