Number of labeled relations on {1,2,...,n} such that 1 and 2 are in the same component.
A226358
Number of labeled relations on {1,2,...,n} such that 1 and 2 are in the same component.
Terms
- a(0) =0a(1) =0a(2) =12a(3) =456a(4) =63264a(5) =33261504a(6) =68578235904
External references
- oeis: A226358