A146015 Number of n X n binary arrays with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.

1, 1, 1, 29, 297, 3639, 84611, 2861167, 210769267, 22904472355, 4109900886123

Offset

1,4

Links

Table of n, a(n) for n=1..11.

Example

Maximal 8 X 8 example
.1.1.1.1.0.0.1.1
.1.0.0.0.0.0.0.1
.0.0.0.0.0.1.0.1
.1.0.0.0.0.1.0.1
.1.1.1.1.0.1.0.0
.0.0.0.0.0.1.1.0
.1.1.1.1.0.0.0.1
.1.0.0.0.1.1.1.1

Crossrefs

Sequence in context: A244873 A125392 A126550 * A163708 A147831 A165616

Adjacent sequences: A146012 A146013 A146014 * A146016 A146017 A146018

Keyword

nonn

Author

R. H. Hardin, Oct 26 2008

Status

approved