A147504 - OEIS

A147504

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1110-0110-0111 pattern in any orientation.

1, 1, 1, 1, 1, 5, 21, 83, 317, 1047, 4695, 28979, 194029, 1669287, 18050319

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

OFFSET

1,6

LINKS

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.0.0.0.0

.0.1.1.0.0.1.0.0

.0.1.1.1.0.1.1.1

.1.0.0.0.0.1.1.1

.1.1.1.0.0.0.0.1

.1.1.1.0.1.1.1.0

.0.0.1.0.0.1.1.0

.0.0.0.0.0.1.1.1

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved