Number of transitive reflexive early confluent binary relations R on n labeled elements where |{y : xRy}| <= 4 for all x.
A210912
Number of transitive reflexive early confluent binary relations R on n labeled elements where |{y : xRy}| <= 4 for all x.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =26a(4) =243a(5) =2451a(6) =29922a(7) =420841a(8) =6692163a(9) =118170959a(10) =2296688956a(11) =48661358989
External references
- oeis: A210912