This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A319625 #7 Sep 25 2018 08:06:51
%S A319625 1,1,0,0,0,0,1,0,1,1,3
%N A319625 Number of non-isomorphic connected weight-n antichains of distinct sets whose dual is also an antichain of distinct sets.
%C A319625 The dual of a multiset partition has, for each vertex, one block consisting of the indices (or positions) of the blocks containing that vertex, counted with multiplicity. For example, the dual of {{1,2},{2,2}} is {{1},{1,2,2}}.
%C A319625 The weight of a multiset partition is the sum of sizes of its parts. Weight is generally not the same as number of vertices.
%F A319625 Euler transform is A319638.
%e A319625 Non-isomorphic representatives of the a(1) = 1 through a(10) = 3 antichains:
%e A319625 {{1}}
%e A319625 {{1,2},{1,3},{2,3}}
%e A319625 {{1,2},{1,3},{2,4},{3,4}}
%e A319625 {{1,2},{1,3},{1,4},{2,3,4}}
%e A319625 {{1,3},{2,4},{1,2,5},{3,4,5}}
%e A319625 {{1,2},{1,3},{2,4},{3,5},{4,5}}
%e A319625 {{1,3},{1,4},{2,3},{2,4},{3,4}}
%Y A319625 Cf. A006126, A007716, A007718, A056156, A059201, A283877, A316980, A316983, A318099, A319557, A319558, A319565, A319616-A319646.
%K A319625 nonn,more
%O A319625 0,11
%A A319625 _Gus Wiseman_, Sep 25 2018