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A147065 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 01010-11111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 4, 7, 20, 27, 84, 153, 692, 1605, 7549, 19036, 103045, 315223, 2201412, 8341738, 68161042, 299153867, 2851751081, 14915115066 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.1.0.1.0
.1.1.0.1.1.1.1.1
.0.1.0.0.0.0.0.0
.1.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.1
.0.0.0.0.0.0.1.0
.1.1.1.1.1.0.1.1
.0.1.0.1.0.0.1.0
CROSSREFS
Sequence in context: A359733 A090879 A084404 * A049947 A266822 A296624
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified May 28 19:55 EDT 2024. Contains 372919 sequences. (Running on oeis4.)