A034140 - A034150: formula

[Rob Pratt]

-----Original Message-----
From: T. D. Noe [mailto:noe at sspectra.com] 
Sent: Thursday, May 26, 2005 2:00 PM
To: Frank Ruskey; seqfan at ext.jussieu.fr
Cc: zak seidov
Subject: Re: A034140 - A034150: formula

At 10:38 AM -0700 5/26/05, Frank Ruskey wrote:
>It might be noted that these sequences are all unimodal and that 
>(1+x)(1+x^2)(1+x^3)...(1+x^n) is the rank generating function of the 
>poset M(n), well loved by algebraic combinatorists.  See, e.g.,
>
>Robert A. Proctor,
>Solution of two difficult combinatorial problems with linear algebra, 
>American Mathematical Monthly, 1989, 721-734.

    ^----- should be 1982

Tony

---

Yes, it's volume 89, but year 1982.

Rob