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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. 0
1, 10, 67, 1859, 144973, 23675451, 10663538347, 12275556405619, 35393545223418744, 261328488528715635157, 4921805399637541783782081, 235643299844227266763714703387 (list; graph; refs; listen; history; text; internal format)
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

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Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)