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A147029 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 33, 33, 81, 81, 593, 593, 11281, 11281, 273235, 273235, 6759617, 6759617 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.1.1.1.0.0.0.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0
.0.0.1.0.0.0.1.0.0
.1.1.1.0.0.0.1.1.1
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A356839 A147172 A146825 * A146258 A146173 A146190
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified May 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)