%I A056935
%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 <a href="Sindx_Pos.html#posets">Index entries for sequences related to 
               posets</a>
%t A056935 MatrixPower[ ZetaP[ #, n + 1 ][ [ 1, Card[ # ] ] ]&@JofP[ Chain[ 2, 3, 
               3 ] ]
%Y A056935 Cf. A000372, A006360, A006361, A006362, A056932, A056933, A056934, A056936, 
               A056937.
%Y A056935 Sequence in context: A045145 A015806 A109836 this_sequence A104651 A136603 
               A114824
%Y A056935 Adjacent sequences: A056932 A056933 A056934 this_sequence A056936 A056937 
               A056938
%K A056935 nonn,easy
%O A056935 0,2
%A A056935 Mitch Harris (Harris.Mitchell(AT)mgh.harvard.edu)