Number of transitive reflexive binary relations R on n labeled elements where |{y : xRy}| <= 3 for all x.
A135429
Number of transitive reflexive binary relations R on n labeled elements where |{y : xRy}| <= 3 for all x.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =29a(4) =210a(5) =2116a(6) =25522a(7) =362832a(8) =6000276a(9) =113593688a(10) =2434603356a(11) =58523364604
External references
- oeis: A135429