|
|
A058793
|
|
Number of covers of an unlabeled n-set such that every point of the set is covered by exactly 6 subsets of the cover and that intersection of every 6 subsets of the cover contains at most one point.
|
|
1
|
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
Cover may include multiple occurrences of a subset. Also n-rowed binary matrices with distinct rows and all row sums 6.
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
more,nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|