A147010 - OEIS

A147010

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 00100-11111-00100 pattern in any orientation.

1, 1, 1, 1, 3, 5, 9, 19, 56, 167, 758, 2457, 14728, 66625, 526225, 3298653, 34425031, 276512141, 3848586911, 41626261490

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,5

LINKS

EXAMPLE

Maximal 8 X 8 example

.0.1.0.0.0.1.0.0

.0.1.0.1.1.1.1.1

.1.1.1.0.0.1.0.0

.0.1.0.0.0.0.1.0

.0.0.1.0.0.1.1.1

.1.1.1.1.1.0.1.0

.0.0.1.0.0.0.1.0

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved