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A147507 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11110-01111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 25, 25, 141, 141, 673, 673, 9515, 9515, 128879, 128879, 2409621, 2409621, 79940355, 79940355 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

LINKS

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

EXAMPLE

Maximal 11 X 11 example

.0.1.0.1.0.0.0.1.0.1.0

.1.1.0.1.1.0.1.1.0.1.1

.1.1.0.1.1.0.1.1.0.1.1

.1.1.0.1.1.0.1.1.0.1.1

.1.0.0.0.1.0.1.0.0.0.1

.0.0.0.0.0.0.0.0.0.0.0

.1.0.0.0.1.0.1.0.0.0.1

.1.1.0.1.1.0.1.1.0.1.1

.1.1.0.1.1.0.1.1.0.1.1

.1.1.0.1.1.0.1.1.0.1.1

.0.1.0.1.0.0.0.1.0.1.0

CROSSREFS

Sequence in context: A040601 A022359 A147491 * A146865 A146740 A146724

Adjacent sequences:  A147504 A147505 A147506 * A147508 A147509 A147510

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified September 23 12:11 EDT 2021. Contains 347617 sequences. (Running on oeis4.)