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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 9 of A180760

LINKS

R. H. Hardin, Table of n, a(n) for n=1..99

CROSSREFS

Sequence in context: A168240 A123779 A123839 * A197121 A175461 A272627

Adjacent sequences:  A180755 A180756 A180757 * A180759 A180760 A180761

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 20 2010

STATUS

approved

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Last modified May 25 19:13 EDT 2019. Contains 323576 sequences. (Running on oeis4.)