A146871 Number of n X n binary arrays with all ones connected only in a 1110-0100-0111 pattern in any orientation.

1, 1, 1, 17, 49, 129, 2097, 70513, 1502401, 23706401, 1391799697, 165323890129, 20222078940001, 2270785085201793

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.1.1.1.0.1.0.0
.0.1.0.0.0.1.1.1
.1.1.1.0.0.1.0.1
.0.0.0.0.0.0.0.1
.0.0.0.0.0.1.0.0
.1.1.1.0.0.1.0.1
.0.0.1.0.0.1.1.1
.0.1.1.1.0.0.0.1

Crossrefs

Sequence in context: A124710 A113867 A049737 * A146791 A126371 A342609

Adjacent sequences: A146868 A146869 A146870 * A146872 A146873 A146874

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved