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A146669 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-0111-0110 pattern in any orientation. 0
1, 1, 1, 1, 1, 7, 21, 49, 219, 1317, 9715, 80153, 817961, 10735885, 177805125, 3599071193, 90866799531, 2886601451049, 113383289044153, 5503065770566291 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.1.0.0
.0.0.1.1.1.0.0.0
.0.1.0.1.1.0.0.1
.0.1.1.0.0.1.1.1
.1.1.1.0.0.1.1.0
.1.0.0.1.1.0.1.0
.0.0.0.1.1.1.0.0
.0.0.1.1.0.0.0.0
CROSSREFS
Sequence in context: A137182 A011927 A163723 * A146637 A146701 A146613
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 28 04:05 EDT 2024. Contains 371235 sequences. (Running on oeis4.)