@article {IOPORT.05639009, author = {Farley, Jonathan David and Klippenstine, Ryan}, title = {Distributive lattices of small width. II: A problem from Stanley's 1986 text {\sl Enumerative combinatorics}.}, year = {2009}, journal = {Journal of Combinatorial Theory. Series A}, volume = {116}, number = {6}, issn = {0097-3165}, pages = {1097-1119}, publisher = {Elsevier Science (Academic Press), San Diego, CA}, doi = {10.1016/j.jcta.2008.08.007}, abstract = {In this paper, the authors solve a problem that {\it R. P. Stanley} posed in his classic text [Enumerative combinatorics. Volume I. Monterey, CA: Wadsworth \& Brooks/Cole Advanced Books \& Software (1986; Zbl 0608.05001)]. Stanley's problem is the following: Fix a natural number $k$. Consider the posets $P$ of cardinality $n$ such that, for $0 < i < n$, $P$ has exactly $k$ ordered ideals of cardinality $i$. If ${f_k}(n)$ is the number of such posets, what is the generating function $\sum {f_3}(n)x^n$? In this paper, the authors investigate this problem, producing a system of recurrence relations that enumerate the isomorphism classes of these lattices. They also derive a generating function from this system of recurrences.}, reviewer = {Renata Majovsk\'a (Horn\'{\i} Such\'a)}, identifier = {05639009}, }