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A098702
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Number of self-polar configurations of type (n_3).
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4
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0, 0, 0, 0, 0, 0, 1, 1, 3, 10, 25, 95, 365, 1432, 5799, 24092, 102413, 445363, 1991320
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OFFSET
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1,9
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LINKS
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EXAMPLE
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Example: the Fano plane is the only 7_3 configuration and it is self-polar.
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CROSSREFS
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KEYWORD
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nonn,nice,hard
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AUTHOR
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EXTENSIONS
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a(1)-a(18) from the Betten, Brinkmann and Pisanski article.
a(19) from the Pisanski et al. article.
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STATUS
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approved
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