Number of connected unlabeled reflexive relations with n nodes such that complement is also connected.
A054920
Number of connected unlabeled reflexive relations with n nodes such that complement is also connected.
Terms
- a(0) =2a(1) =4a(2) =68a(3) =2592a(4) =278796a(5) =95720106a(6) =111891292036
External references
- oeis: A054920