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A144235
Number of n X n binary arrays with every 1 adjacent to at least one other 1 both bishopwise and rookwise but with no three 1s in a row bishopwise or rookwise.
0
1, 2, 13, 53, 596, 21034, 722350, 49238419, 8020460416, 2087191559445
OFFSET
1,2
CROSSREFS
Sequence in context: A030517 A048502 A177077 * A180041 A042061 A229736
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 15 2008
STATUS
approved