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A147000 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 00100-00100-11111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 5, 1, 11, 3, 31, 8, 90, 23, 344, 61, 1429, 183, 6788, 609, 37364, 3021, 252513 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.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
.0.1.1.1.0.1.1.1.0
.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
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A126132 A129982 A052552 * A147486 A168018 A173238
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified June 6 20:05 EDT 2023. Contains 363151 sequences. (Running on oeis4.)