OFFSET
1,2
LINKS
Sam Hopkins, Order polynomial product formulas and poset dynamics, arXiv 2006.01568 [math.CO], 2020.
MathOverflow, Unified framework for posets with order polynomial product formulas, 2019.
EXAMPLE
For n <= 3 all posets are counted.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Richard Stanley, Jul 12 2020
STATUS
approved