A180761 Half the number of n X n binary arrays with each element equal to at least one neighbor

0, 3, 63, 4475, 1154119, 1064583557, 3538520414645, 42325704140613463, 1822180205677117048273, 282344956970612464702333909, 157459613671260527898784781898227

Offset

1,2

Comments

Diagonal of A180771

Links

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

Crossrefs

Sequence in context: A369955 A123687 A159605 * A156904 A193100 A053857

Adjacent sequences: A180758 A180759 A180760 * A180762 A180763 A180764

Keyword

nonn

Author

R. H. Hardin Sep 20 2010

Status

approved