A147046 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.

1, 1, 1, 3, 5, 13, 29, 101, 469, 2569, 14457, 96029, 884501, 9747473, 128659273, 1994890829, 37888899645, 865586757513, 24269607911697, 821230507381717, 33773516260252773, 1665299606145236705, 99884037640157459321

Offset

1,4

Links

Table of n, a(n) for n=1..23.

Example

Maximal 8 X 8 example
.0.0.1.0.0.0.1.0
.0.0.1.1.0.0.1.1
.1.1.1.0.1.1.1.0
.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0
.0.0.1.1.0.1.1.1
.1.1.1.0.1.1.0.0
.0.1.0.0.0.1.0.0

Crossrefs

Sequence in context: A335562 A106666 A124791 * A233232 A144471 A190667

Adjacent sequences: A147043 A147044 A147045 * A147047 A147048 A147049

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved