A147416 - OEIS

A147416

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111-0110 pattern in any orientation.

1, 1, 1, 1, 1, 3, 9, 20, 53, 192, 789, 4160, 25089, 166861, 1330315, 12854522

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

OFFSET

1,6

LINKS

EXAMPLE

Maximal 8 X 8 example

.0.0.1.0.0.1.0.0

.0.0.1.1.1.1.0.0

.1.1.0.1.1.0.1.1

.0.1.1.0.0.1.1.0

.1.1.0.1.1.0.1.1

.0.0.1.1.1.1.0.0

.0.0.1.0.0.1.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved