A144052 Number of n X n binary arrays with every 1 adjacent to at least one other 1, but at most one 1 adjacent horizontally and at most one 1 adjacent vertically.

1, 10, 67, 1859, 144973, 23675451, 10663538347, 12275556405619, 35393545223418744, 261328488528715635157, 4921805399637541783782081, 235643299844227266763714703387

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Crossrefs

Sequence in context: A324366 A197783 A197751 * A280438 A192021 A026984

Adjacent sequences: A144049 A144050 A144051 * A144053 A144054 A144055

Keyword

nonn

Author

R. H. Hardin, Sep 08 2008

Status

approved