Number of permutations of length n whose associated Schubert variety is defined by inclusions.
A213090
Number of permutations of length n whose associated Schubert variety is defined by inclusions.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =101a(6) =477a(7) =2343a(8) =11762a(9) =59786a(10) =306132a(11) =1574536a(12) =8120782a(13) =41957030a(14) =217021682a(15) =1123371986a(16) =5817788471a(17) =30139492189a(18) =156174965473a(19) =809382185187
External references
- oeis: A213090