A147202 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0101-0111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 17, 27, 551, 1021, 8573, 22795, 308785, 847643, 66874367, 234921783, 36568568531, 162590981411, 22736801115521, 121607805121155, 25119564285391935

Offset

1,7

Links

Table of n, a(n) for n=1..21.

Example

Maximal 8 X 8 example
.1.0.0.0.0.0.0.1
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.0.1.1.0.0.1.1.0
.1.0.0.0.0.0.0.1
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.0.1.1.0.0.1.1.0

Crossrefs

Sequence in context: A033702 A000797 A171168 * A146776 A147218 A146856

Adjacent sequences: A147199 A147200 A147201 * A147203 A147204 A147205

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved