Commuting permutations: number of ordered triples of permutations f, g, h in Symm(n) which all commute.
A072169
Commuting permutations: number of ordered triples of permutations f, g, h in Symm(n) which all commute.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =48a(4) =504a(5) =4680a(6) =66240a(7) =856800a(8) =14515200a(9) =242040960a(10) =4775500800a(11) =95520902400
External references
- oeis: A072169