A146283 - OEIS

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A146283

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 111-110-111 pattern in any orientation.

1, 1, 1, 1, 1, 5, 13, 25, 59, 333, 1935, 9121, 45829, 402153, 4332077, 45059163, 497321737, 7788926343, 155218822227, 3328515197229, 77996266328591, 2325236376116081, 87368606923472999, 3749372750743895557

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

OFFSET

1,6

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.1.1.1

.0.0.0.0.0.0.1.1

.0.0.0.0.0.1.1.1

.0.0.0.0.0.0.0.0