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A143881
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Number of ways of placing kings with no more than 3 mutual attacks on an n X n chessboard.
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4
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..9.
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CROSSREFS
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Cf. A143870, A143875, A143886.
Cf. A143882, A143883, A143884, A143885.
Sequence in context: A020565 A282521 A099718 * A298692 A132493 A135860
Adjacent sequences: A143878 A143879 A143880 * A143882 A143883 A143884
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KEYWORD
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nonn,more,hard
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AUTHOR
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R. H. Hardin, Sep 04 2008
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STATUS
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approved
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