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A147164 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1101-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 57, 57, 317, 317, 3151, 3151, 61021, 61021, 1767277, 1767277, 57009275, 57009275 (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
.1.0.1.1.0.1.1.0.1
.1.1.1.0.0.0.1.1.1
.0.0.0.0.0.0.0.0.0
.1.1.1.0.0.0.1.1.1
.1.0.1.1.0.1.1.0.1
.0.0.0.1.0.1.0.0.0
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146684 A146652 A147133 * A146692 A146439 A146785
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified February 20 21:52 EST 2024. Contains 370219 sequences. (Running on oeis4.)