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A293994 Number of unlabeled multiset clutters of weight n. 31
1, 1, 2, 3, 7, 13, 39, 88, 265 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
A multiset clutter is a connected antichain of finite multisets. The weight of a multiset clutter is the sum of cardinalities (counting multiplicity) of its edges.
LINKS
EXAMPLE
Non-isomorphic representatives of the a(5) = 13 multiset clutters are:
((11111)), ((11112)), ((11122)), ((11123)), ((11223)), ((11234)), ((12345)), ((11)(122)), ((11)(123)), ((12)(111)), ((12)(113)), ((12)(134)), ((13)(122)).
CROSSREFS
Sequence in context: A345247 A013917 A371181 * A196419 A056893 A051130
KEYWORD
nonn,more
AUTHOR
Gus Wiseman, Oct 21 2017
STATUS
approved

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Last modified May 18 15:59 EDT 2024. Contains 372664 sequences. (Running on oeis4.)