Number of interval posets of permutations with n minimal elements.
A348479
Number of interval posets of permutations with n minimal elements.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =52a(5) =240a(6) =1160a(7) =5795a(8) =29681a(9) =155025a(10) =822563a(11) =4421458a(12) =24025518a(13) =131759106a(14) =728330062a(15) =4053823980a(16) =22699853940a(17) =127790656040a(18) =722835069984
External references
- oeis: A348479