A146682 Number of n X n binary arrays with all ones connected only in a 1100-1000-1111 pattern in any orientation.

1, 1, 1, 17, 57, 265, 2569, 53981, 1294213, 32947589, 1419168779, 106809574383

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.1.1.1.0.1.1.1.1
.1.0.1.0.0.0.0.1
.1.0.0.0.0.0.1.1
.1.0.0.0.0.0.0.0
.0.0.1.0.0.0.0.0
.0.0.1.0.1.1.0.0
.1.0.1.0.1.0.0.0
.1.1.1.0.1.1.1.1

Crossrefs

Sequence in context: A253417 A117390 A141841 * A146650 A147131 A147162

Adjacent sequences: A146679 A146680 A146681 * A146683 A146684 A146685

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved