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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

Table of n, a(n) for n=0..8.

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

Cf. A007716, A048143, A286520, A293607, A293993.

Sequence in context: A123408 A033995 A013917 * A196419 A056893 A051130

Adjacent sequences:  A293991 A293992 A293993 * A293995 A293996 A293997

KEYWORD

nonn,more

AUTHOR

Gus Wiseman, Oct 21 2017

STATUS

approved

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Last modified May 12 07:28 EDT 2021. Contains 343821 sequences. (Running on oeis4.)