[seqfan] possible sequence in Khamis paper

[N. J. A. Sloane]

Dear SeqFans, It looks like this paper may have
a sequence that is not in the OEIS - can anyone 
track it down and submit it?

Soheir Mohamed Khamis, Exact Counting of Unlabeled Rigid Interval Posets Regarding or Disregarding Height, Order (journal), published on-line, 2011; DOI: 10.1007/s11083-011-9213-5.

It appeared in "Order", but I don't have access to that journal.

Neil