

A374073


Number of connected chainmails with n unlabeled elements.


1




OFFSET

1,3


COMMENTS

In a poset, a mail is a nonempty set of elements of the poset having a common lower bound. A chainmail is a poset in which every mail has a join. A chainmail is connected if it's connected as a poset.


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KEYWORD

nonn,hard,more


AUTHOR



STATUS

approved



