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A180751
Half the number of n X n binary arrays with each element equal to at least two neighbors
0
0, 1, 1, 9, 86, 2986, 205020, 33329847, 11843513563, 9371551715962, 16360949033733903
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OFFSET
1,4
COMMENTS
Diagonal of
A180760
LINKS
Table of n, a(n) for n=1..11.
CROSSREFS
Sequence in context:
A015581
A152261
A028339
*
A266828
A100814
A055725
Adjacent sequences:
A180748
A180749
A180750
*
A180752
A180753
A180754
KEYWORD
nonn
AUTHOR
R. H. Hardin
Sep 20 2010
STATUS
approved
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Last modified May 15 20:14 EDT 2024. Contains 372549 sequences. (Running on oeis4.)