A144235 - OEIS

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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

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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