A147062 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01010-11111 pattern in any orientation.

1, 1, 1, 1, 1, 3, 10, 29, 96, 333, 1304, 7679, 55914, 466003, 4423899, 47937378, 606115023, 9533642435, 182376263152, 4158250315340, 111416233674712, 3515485102434381

Offset

1,6

Links

Table of n, a(n) for n=1..22.

Example

Maximal 8 X 8 example
.0.1.1.1.1.1.0.0
.1.0.1.0.1.0.0.0
.1.1.0.0.0.0.0.1
.1.0.0.0.0.0.1.1
.1.1.0.0.0.0.0.1
.1.0.0.0.0.0.1.1
.0.0.0.1.0.1.0.1
.0.0.1.1.1.1.1.0

Crossrefs

Sequence in context: A147363 A147226 A301879 * A293155 A146384 A166174

Adjacent sequences: A147059 A147060 A147061 * A147063 A147064 A147065

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved