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A147323 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 3, 6, 13, 25, 41, 67, 149, 438 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.1.0.0.1.1.1.1.1

.1.0.0.0.0.1.0.0

.1.1.1.1.0.1.0.0

.1.0.0.0.0.1.0.1

.1.0.1.0.0.0.0.1

.0.0.1.0.1.1.1.1

.0.0.1.0.0.0.0.1

.1.1.1.1.1.0.0.1

CROSSREFS

Sequence in context: A032287 A199403 A006017 * A047183 A047194 A048039

Adjacent sequences:  A147320 A147321 A147322 * A147324 A147325 A147326

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified May 10 23:31 EDT 2021. Contains 343784 sequences. (Running on oeis4.)