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 A056935 #18 Jun 01 2025 22:52:52 %S A056935 1,175,8790,211250,3092808,31635580,246441430,1549486490,8192995479, %T A056935 37548347569,152602439244,559835910940,1880152558980,5846268790220, %U A056935 16988036626948,46486024648180,120562654732065,297976456047575 %N A056935 Antichains (or order ideals) in the poset 2*3*3*n or size of the distributive lattice J(2*3*3*n). %D A056935 Berman and Koehler, Cardinalities of finite distributive lattices, Mitteilungen aus dem Mathematischen Seminar Giessen, 121 (1976), p. 103-124 %H A056935 J. Berman and P. Koehler, <a href="/A006356/a006356.pdf">Cardinalities of finite distributive lattices</a>, Mitteilungen aus dem Mathematischen Seminar Giessen, 121 (1976), 103-124. [Annotated scanned copy] %H A056935 <a href="/index/Pos#posets">Index entries for sequences related to posets</a> %Y A056935 Cf. A000372, A006360, A006361, A006362, A056932, A056933, A056934, A056936, A056937. %K A056935 nonn,easy %O A056935 0,2 %A A056935 _Mitch Harris_