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A146777 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0010-1010-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 205, 205, 3001, 3001, 66003, 66003, 1489297, 1489297, 39955495, 39955495 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.0.1.0.1.0.1.0.1.0
.1.1.1.1.0.1.1.1.1
.0.0.0.0.0.0.0.0.0
.1.1.1.1.0.1.1.1.1
.0.1.0.1.0.1.0.1.0
.0.1.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146793 A146801 A147203 * A147053 A146857 A146668
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)