A146634 Number of n X n binary arrays with all ones connected only in a 1010-1111-0100 pattern in any orientation.

1, 1, 1, 17, 49, 309, 4193, 83267, 2435243, 97883893, 6457826001, 684365474903

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.1.1.0.0.0.0.1.0
.0.1.1.0.1.1.1.1
.1.1.0.0.0.1.0.1
.0.1.0.0.0.0.0.0
.0.0.0.0.0.0.1.1
.0.0.0.1.0.1.1.0
.0.1.1.1.1.0.1.1
.0.0.1.0.1.0.1.0

Crossrefs

Sequence in context: A146862 A146586 A146626 * A146831 A146698 A146706

Adjacent sequences: A146631 A146632 A146633 * A146635 A146636 A146637

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved