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A147367 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 01110-11111 pattern in any orientation. 0
1, 1, 1, 1, 5, 9, 28, 65, 286, 1283, 8624, 48653, 407612, 3268073, 37940635, 437037462 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
LINKS
EXAMPLE
Maximal 8 X 8 example
.1.0.0.0.0.0.0.0
.1.1.0.1.1.1.1.1
.1.1.0.0.1.1.1.0
.1.1.0.0.0.0.0.1
.1.0.0.0.0.0.1.1
.0.1.1.1.0.0.1.1
.1.1.1.1.1.0.1.1
.0.0.0.0.0.0.0.1
CROSSREFS
Sequence in context: A301747 A193316 A026587 * A147230 A192914 A303676
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified June 6 22:19 EDT 2023. Contains 363151 sequences. (Running on oeis4.)