Number of transitive reflexive early confluent binary relations R on n labeled elements with max_{x}(|{y : xRy}|) = 2.
A218092
Number of transitive reflexive early confluent binary relations R on n labeled elements with max_{x}(|{y : xRy}|) = 2.
Terms
- a(0) =3a(1) =12a(2) =61a(3) =310a(4) =1821a(5) =11592a(6) =80963a(7) =608832a(8) =4910785a(9) =42159238a(10) =383478987a(11) =3678859158a(12) =37087880753a(13) =391641822540
External references
- oeis: A218092