A147019 Number of n X n binary arrays with all ones connected only in a 01000-11111-01000 pattern in any orientation.

1, 1, 1, 1, 13, 57, 277, 2427, 27961, 440433, 11044775, 365499077, 16910160525, 1114224590577

Offset

1,5

Links

Table of n, a(n) for n=1..14.

Example

Maximal 8 X 8 example
.0.1.0.0.1.0.0.0
.0.1.0.1.1.1.1.1
.0.1.0.0.1.0.0.0
.1.1.1.0.0.0.1.0
.0.1.0.0.0.1.1.1
.0.0.0.1.0.0.1.0
.1.1.1.1.1.0.1.0
.0.0.0.1.0.0.1.0

Crossrefs

Sequence in context: A212405 A147384 A147011 * A230988 A183317 A365749

Adjacent sequences: A147016 A147017 A147018 * A147020 A147021 A147022

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved