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A147080 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 10000-11111-10000 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 9, 3, 31, 9, 107, 21, 322, 61, 1322, 210, 6485, 735, 37564 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,11
LINKS
EXAMPLE
Maximal 11 X 11 example
.0.0.0.0.1.1.1.0.0.0.0
.0.0.0.0.0.1.0.0.0.0.0
.0.0.0.0.0.1.0.0.0.0.0
.0.0.0.0.0.1.0.0.0.0.0
.1.0.0.0.0.1.0.0.0.0.1
.1.1.1.1.1.0.1.1.1.1.1
.1.0.0.0.0.1.0.0.0.0.1
.0.0.0.0.0.1.0.0.0.0.0
.0.0.0.0.0.1.0.0.0.0.0
.0.0.0.0.0.1.0.0.0.0.0
.0.0.0.0.1.1.1.0.0.0.0
CROSSREFS
Sequence in context: A355227 A264148 A038001 * A146418 A146011 A104620
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified April 25 11:06 EDT 2024. Contains 371967 sequences. (Running on oeis4.)