A147498 - OEIS

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A147498

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

0

1, 1, 1, 1, 1, 1, 9, 13, 169, 289, 1635, 3769, 26681, 58223, 2298509, 6525751

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

OFFSET

1,7

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Maximal 8 X 8 example

.1.0.0.0.0.0.0.1

.1.1.1.0.0.1.1.1

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

.1.0.0.0.0.0.0.1

.1.1.1.0.0.1.1.1

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

CROSSREFS

Sequence in context: A108748 A116106 A123813 * A115445 A131602 A004474

Adjacent sequences: A147495 A147496 A147497 * A147499 A147500 A147501

KEYWORD

nonn

AUTHOR

STATUS

approved