A147500 - OEIS

A147500

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1110-0110-0111 pattern in any orientation.

1, 1, 1, 1, 1, 3, 9, 19, 37, 159, 849, 4243, 19707, 136969, 1272775, 12839957

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

OFFSET

1,6

LINKS

EXAMPLE

Maximal 8 X 8 example

.0.0.1.1.1.0.0.0

.0.0.0.1.1.0.0.0

.1.0.0.1.1.1.0.0

.1.1.1.0.0.0.0.0

.0.0.1.0.0.0.0.0

.0.0.0.0.0.0.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved