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A147326 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation. 0
1, 1, 1, 1, 5, 1, 9, 1, 54, 15, 1010, 305, 26482, 3993, 1090248, 85931, 79078189, 4847983, 11622838412, 605747926, 3166762458310, 124132744693, 1523768055043582, 41573048881668 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.1.0.0.0.0
.0.0.1.1.1.1.1.0.0
.0.1.0.0.1.0.0.1.0
.0.1.0.0.1.0.0.1.0
.1.1.1.1.0.1.1.1.1
.0.1.0.0.1.0.0.1.0
.0.1.0.0.1.0.0.1.0
.0.0.1.1.1.1.1.0.0
.0.0.0.0.1.0.0.0.0
CROSSREFS
Sequence in context: A046580 A050358 A147319 * A336048 A143114 A103133
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified March 28 04:05 EDT 2024. Contains 371235 sequences. (Running on oeis4.)