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A180758
Half the number of nX9 binary arrays with each element equal to at least two neighbors
1
0, 21, 67, 2059, 41755, 986376, 22238670, 514990479, 11843513563, 273193577866, 6295815062637, 145178091690740, 3347707869286493, 77204310077778551, 1780484848971706031, 41062118413701907548, 946988189894419322573
OFFSET
1,2
COMMENTS
Column 9 of A180760
LINKS
CROSSREFS
Sequence in context: A168240 A123779 A123839 * A197121 A175461 A272627
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 20 2010
STATUS
approved