A180769 Half the number of nX9 binary arrays with each element equal to at least one neighbor

21, 12377, 3365327, 953982820, 273289411333, 78060898850787, 22310318523546774, 6375989200126477033, 1822180205677117048273, 520757452730725828979262, 148826239836327503673819877

Offset

1,1

Comments

Column 9 of A180771

Links

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

Crossrefs

Sequence in context: A046183 A203674 A250065 * A220643 A185557 A276513

Adjacent sequences: A180766 A180767 A180768 * A180770 A180771 A180772

Keyword

nonn

Author

R. H. Hardin Sep 20 2010

Status

approved