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%I #13 Aug 27 2022 03:37:16
%S 1,5,44,966,53535,7043925,1775617861,738134963014,461550358993886,
%T 409321620633426443,493892363593918906465
%N 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.
%C Cover may include multiple occurrences of a subset. Also n-rowed binary matrices with distinct rows and all row sums 5.
%H Vladeta Jovovic, <a href="/A058790/a058790.pdf">Formula</a>
%Y Row n=5 of A331508.
%Y Cf. A050535, A050913, A058783, A058784, A058785.
%K more,nonn
%O 1,2
%A _Vladeta Jovovic_, Nov 30 2000
%E a(7)-a(10) from _Andrew Howroyd_, Jan 29 2020
%E a(11) from _Sean A. Irvine_, Aug 27 2022
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