Number of edges in the Hasse diagram of the subgroup lattice of the symmetric group.
A218927
Number of edges in the Hasse diagram of the subgroup lattice of the symmetric group.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =8a(4) =66a(5) =501a(6) =6469a(7) =60428a(8) =926743a(9) =11902600a(10) =240066343a(11) =3677270225a(12) =108748156239
External references
- oeis: A218927