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A180761 Half the number of n X n binary arrays with each element equal to at least one neighbor 0
0, 3, 63, 4475, 1154119, 1064583557, 3538520414645, 42325704140613463, 1822180205677117048273, 282344956970612464702333909, 157459613671260527898784781898227 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A180771

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

Sequence in context: A258657 A123687 A159605 * A156904 A193100 A053857

Adjacent sequences:  A180758 A180759 A180760 * A180762 A180763 A180764

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 20 2010

STATUS

approved

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Last modified April 21 06:42 EDT 2019. Contains 322310 sequences. (Running on oeis4.)