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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Sequence in context: A030517 A048502 A177077 * A180041 A042061 A229736

Adjacent sequences:  A144232 A144233 A144234 * A144236 A144237 A144238

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 15 2008

STATUS

approved

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Last modified July 11 20:03 EDT 2020. Contains 335652 sequences. (Running on oeis4.)