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A146716 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-1000 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 53, 53, 349, 349, 4017, 4017, 76237, 76237, 2269673, 2269673, 85654393, 85654393 (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
.0.0.0.1.0.1.0.0.0
.1.1.1.1.0.1.1.1.1
.0.0.1.1.0.1.1.0.0
.0.0.0.0.0.0.0.0.0
.0.0.1.1.0.1.1.0.0
.1.1.1.1.0.1.1.1.1
.0.0.0.1.0.1.0.0.0
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146644 A146612 A146849 * A146399 A146407 A146684
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified August 6 07:25 EDT 2024. Contains 374960 sequences. (Running on oeis4.)