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URL: https://oeis.org/A058792

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A058792
Number of covers of an unlabeled n-set such that every point of the set is covered by exactly 5 subsets of the cover and that intersection of every 5 subsets of the cover contains at most one point.
1
1, 5, 44, 966, 53535, 7043925, 1775617861, 738134963014, 461550358993886, 409321620633426443, 493892363593918906465
OFFSET
1,2
COMMENTS
Cover may include multiple occurrences of a subset. Also n-rowed binary matrices with distinct rows and all row sums 5.
LINKS
CROSSREFS
Row n=5 of A331508.
Sequence in context: A048940 A218375 A360988 * A374583 A113948 A215517
KEYWORD
more,nonn
AUTHOR
Vladeta Jovovic, Nov 30 2000
EXTENSIONS
a(7)-a(10) from Andrew Howroyd, Jan 29 2020
a(11) from Sean A. Irvine, Aug 27 2022
STATUS
approved