Number of interval-closed sets in the root poset of type A(n).
A367316
Number of interval-closed sets in the root poset of type A(n).
Terms
- a(0) =1a(1) =2a(2) =8a(3) =45a(4) =307a(5) =2385a(6) =20362a(7) =186812a(8) =1814156a(9) =18448851a(10) =194918129a(11) =2126727740
External references
- oeis: A367316