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A146396 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 9, 21, 85, 433, 2775, 20277, 189267, 2151189, 36658025, 657296273, 17789206817 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.1.1.1.0

.0.0.1.1.0.0.1.1

.1.0.0.1.0.0.0.1

.1.1.0.0.1.1.1.0

.0.1.1.1.0.0.1.1

.1.0.0.0.1.0.0.1

.1.1.0.0.1.1.0.0

.0.1.1.1.0.1.1.1

CROSSREFS

Sequence in context: A137340 A075640 A147480 * A146681 A269633 A279389

Adjacent sequences:  A146393 A146394 A146395 * A146397 A146398 A146399

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified August 16 11:28 EDT 2022. Contains 356168 sequences. (Running on oeis4.)