A146570 Number of n X n binary arrays with all ones connected only in a 0100-0100-1111 pattern in any orientation.

1, 1, 1, 17, 57, 369, 6075, 152201, 4520107, 199476793, 15394540581, 1933912591517, 348262962157565

Offset

1,4

Links

Table of n, a(n) for n=1..13.

Example

Maximal 8 X 8 example
.1.1.1.1.0.0.0.1
.0.1.0.0.0.1.1.1
.0.1.0.0.0.0.0.1
.1.0.0.0.0.1.0.1
.1.1.1.0.0.1.0.0
.1.0.0.1.0.1.1.1
.1.0.0.1.0.1.0.0
.0.1.1.1.1.0.0.0

Crossrefs

Sequence in context: A146690 A146437 A146783 * A147209 A147239 A264473

Adjacent sequences: A146567 A146568 A146569 * A146571 A146572 A146573

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved