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 A322138 #4 Nov 28 2018 08:03:18
%S A322138 1,0,2,3,7,7,20,26,78,184,553
%N A322138 Number of non-isomorphic weight-n blobs (2-connected weak antichains) of multisets with no singletons.
%C A322138 The weight of a multiset partition is the sum of sizes of its parts. Weight is generally not the same as number of vertices.
%e A322138 Non-isomorphic representatives of the a(2) = 2 through a(7) = 26 blobs:
%e A322138 {{11}} {{111}} {{1111}} {{11111}} {{111111}} {{1111111}}
%e A322138 {{12}} {{122}} {{1122}} {{11222}} {{111222}} {{1112222}}
%e A322138 {{123}} {{1222}} {{12222}} {{112222}} {{1122222}}
%e A322138 {{1233}} {{12233}} {{112233}} {{1122333}}
%e A322138 {{1234}} {{12333}} {{122222}} {{1222222}}
%e A322138 {{11}{11}} {{12344}} {{122333}} {{1222333}}
%e A322138 {{12}{12}} {{12345}} {{123333}} {{1223333}}
%e A322138 {{123344}} {{1223344}}
%e A322138 {{123444}} {{1233333}}
%e A322138 {{123455}} {{1233444}}
%e A322138 {{123456}} {{1234444}}
%e A322138 {{111}{111}} {{1234455}}
%e A322138 {{112}{122}} {{1234555}}
%e A322138 {{122}{122}} {{1234566}}
%e A322138 {{123}{123}} {{1234567}}
%e A322138 {{123}{233}} {{112}{1222}}
%e A322138 {{134}{234}} {{122}{1233}}
%e A322138 {{11}{11}{11}} {{123}{2233}}
%e A322138 {{12}{12}{12}} {{123}{2333}}
%e A322138 {{12}{13}{23}} {{123}{2344}}
%e A322138 {{134}{2344}}
%e A322138 {{145}{2345}}
%e A322138 {{223}{1233}}
%e A322138 {{344}{1234}}
%e A322138 {{12}{13}{233}}
%e A322138 {{13}{14}{234}}
%Y A322138 Cf. A002218, A007718, A013922, A275307, A286520, A293994, A304118, A304887, A319719, A322110, A322117, A322118.
%K A322138 nonn,more
%O A322138 0,3
%A A322138 _Gus Wiseman_, Nov 27 2018